Digital Defence Arsenal: How Emerging Technologies Are Redefining Modern Defence

The nature of warfare and national security has never been static, but the current era stands apart in the sheer velocity and scale of its transformation. Across every military operational domain – land, sea, air, space, and more recently cyberspace – a tsunami of technological innovation is challenging long-held assumptions about how military power is built, projected, and sustained. For governments, armed forces, defence contractors, and professionals in the ecosystem, understanding where this transformation is headed is no longer optional.

This bulletin provides a structured overview of seven critical technology trends currently reshaping the global defence sector, offering both an assessment of their present state and a forward-looking perspective on their implications.

1. Artificial Intelligence

Few technologies have attracted as much investment or expectation in the defence sector as artificial intelligence (“AI”). Its appeal is straightforward: the ability to process and interpret vast quantities of operational data at machine speed offers commanders, planners, and logisticians capabilities that were simply not achievable with human cognition alone. Whether used to detect anomalies in network traffic, predict equipment failure before it occurs, or navigate unmanned platforms in contested environments, AI is becoming embedded in the operational fabric of modern militaries.

The scope of current AI applications in defence is broad and expanding. Crewless underwater vehicles are being developed with AI-driven navigation systems capable of operating independently in complex environments. Command and control architectures are being redesigned around AI-assisted decision support, enabling faster synthesis of intelligence feeds from multiple sources. On the maintenance side, predictive algorithms are already reducing equipment downtime by identifying failure patterns before they manifest, a development with significant implications for operational readiness and lifecycle cost management.

Canada has formally positioned AI as a strategic defence priority. The Department of National Defence, in its 2024 policy titled Our North, Strong and Free: A Renewed Vision for Canada’s Defence (“National Defence Policy”), states: “While strategic competition and climate change shape our security environment, technological developments have sped up the impact of these shifts. Artificial intelligence, quantum computing, synthetic biology, data analytics, autonomous systems, robotics and advanced cyber and space technologies are frontier technologies whose military and non-military uses create new vulnerabilities and complicate our national security interest.” The National Defence Policy explicitly identifies AI and emerging technologies as priorities for the Canadian Armed Forces, particularly in the context of enhancing situational awareness, decision-making, and Arctic surveillance capabilities.

As a NATO member, Canada has also committed to the principles of Responsible Use of Artificial Intelligence in Defence, which establish ethical and operational standards for AI integration across allied military establishments.

2. Cybersecurity

As the defence sector grows more reliant on interconnected digital systems, the security of those systems has become a strategic concern of the highest order. In the National Defence Policy, the Department of National Defense states: “Technology also enables ‘hybrid’ or ‘grey zone’ attacks in the cyber and information domains, intellectual property theft, privacy breaches, and the use of civilian companies or research institutions to advance military goals. Adversaries exploit these vulnerabilities to weaken [Canada’s] defence industrial base, compromise [its] industrial supply chains and interfere with [its] sovereign decision-making processes.”

Military infrastructure, from command networks and satellite communications to logistics platforms and weapons systems, now depends on data integrity in ways that create real and persistent vulnerability. The organizations and state actors seeking to exploit those vulnerabilities are themselves becoming more capable, better resourced, and more willing to act.

The response from the defence community has involved substantial investment in next-generation protective technologies, including AI-assisted threat detection, post-quantum cryptography, and encrypted communications architectures. For instance, in March 2026, the Canadian government announced an investment of $900 million, through Canada’s Defence Industrial Strategy, in a long-term plan to build a resilient domestic defence economy.

Looking ahead, the trajectory is clear: cybersecurity investment in the defence sector will continue to grow substantially. AI will be a force multiplier on both sides of the equation, enabling more sophisticated and targeted attacks, while also powering the detection and response capabilities needed to counter them. The expanding use of cloud computing and Internet of Things (“IoT”) devices across military operations will further widen the potential attack surface, demanding continuous vigilance.

3. Additive Manufacturing (or 3D Printing)

The ability to manufacture a complex precision component in hours rather than weeks, at a location of choice rather than in a distant factory, while being able to control and manage any knowledge related to such manufacturing to a limited number of individuals, represents a meaningful shift in the logic of military supply chains. In the Report from Canada’s Economic Strategy Tables: Advanced Manufacturing, the Innovation, Science and Economic Development of Canada states that Canada needs to be more competitive if it has to become a manufacturing nation. They note: “Now is the time for Canada to take the lead and achieve goals that matter to [Canadians]. By working together and building on existing initiatives, such as the superclusters initiative and the Strategic Innovation Fund, we can build better products, infrastructure and healthcare solutions while becoming more economically diverse and sustainable. At the same time, we can create better jobs for an inclusive and highly digitally skilled workforce, improving quality of life for all Canadians by building skills in digitization, robotics, additive manufacturing and others.”

Additive manufacturing has moved well beyond its origins as a prototyping tool; it is now being deployed to produce functional, mission-critical parts for some of the world’s most demanding operational environments. The defence applications are varied and consequential. For example, air forces have adopted additive processes to resolve the perennial challenge of obsolete spare parts, components for legacy aircraft that are no longer commercially manufactured but can now be reproduced on demand to precise specifications.

Beyond maintenance, the technology enables in-field construction of structures ranging from field fortifications to bridging, reducing the logistical burden of transporting pre-manufactured materials to operating locations. At the platform level, in some cases, the weight advantages of additively manufactured components, which tend to use less raw material than their conventionally produced counterparts whilst meeting equivalent structural and integrity requirements, translate directly into performance, range, and fuel efficiency gains. The Canadian Government states: “Many militaries are conducting research into in-field manufacturing aimed at reducing overall logistical burdens. The ubiquitous nature of 3D printed drones and munitions on the modern battlefield indicates the Canadian Armed Forces should become more familiar with the technology and integrate 3D printing into the field force and institutional support.”

The market outlook reflects the growing strategic importance of this technology, with the global defence additive manufacturing market projected to expand significantly over the coming years, driven by modernization programs, supply chain resilience imperatives, and the shift toward digital manufacturing integration.

4. Robotics and Autonomous Systems

The deployment of robotic and autonomous systems in military contexts is accelerating. Across land, maritime, and undersea domains, unmanned platforms are taking on roles that were previously performed by personnel at significant personal risk, from the clearance of improvised explosive devices to the surveillance of contested maritime approaches. The operational logic is compelling: these systems can be placed in harm’s way without placing human lives at equivalent risk, whilst maintaining or improving the quality of information and effect delivered.

Robotic ground vehicles can be used to resupply frontline positions and recover casualties under fire, tasks that previously required personnel to operate in highly exposed conditions. Drones, in particular, have emerged as a defining technology in modern times, employed across a striking range of missions from intelligence gathering to direct strike, at a cost-per-platform that makes them deployable in numbers that more expensive weapons cannot match. Their trajectory points firmly toward continued and expanding use.

In the next years, AI integration is expected to take autonomous systems a meaningful step further, from platforms that execute defined instructions to platforms that can evaluate evolving conditions and contribute actively to operational decision-making. The defence robotics market is projected to grow significantly over the next years. Defence Research and Development Canada, the research arm of the Department of National Defence, will take center stage by conducting and funding research into unmanned and autonomous systems for Canadian defence applications, across land, maritime, and air domains.

5. Augmented Reality

Augmented reality (“AR”) has found a natural home in defence, where the fusion of real-world situational awareness with layers of contextual data can directly affect both performance and survival. Such technology enables commanders and soldiers alike to access information, navigation data, threat identification, communications, and equipment status without interrupting their engagement with the environment around them, a capability that carries obvious tactical value.

Training represents the domain where AR has achieved its deepest integration to date, and where its benefits are perhaps most clearly demonstrable. Immersive training environments allow military personnel to rehearse complex scenarios, from urban warfare to aerial combat, in conditions that can be customized, repeated, and made progressively more demanding, all without the cost, logistics burden, or physical risk of live training. Fighter pilots can practice responses to adversary systems that do not yet exist in operational form. Ground forces can rehearse specific building clearance or route operations in digital replicas of actual terrain before conducting the mission in reality.

Further to the RCAF Training Modernization Strategy, the Future Aircrew Training Program (“FAcT”) will implement innovative technologies, instructional tools, and methodologies allowing for timely training to be provided in a rapidly changing environment. In the same vein, in 2024, the Royal Canadian Air Force (“RCAF”) signed a long-term contract to equip RCAF with state-of-the-art platforms for aircrew training, allowing it to meet the aerospace requirements of the Canadian Armed Forces.

6. Advanced Satellite Technology

Space has become an increasingly contested strategic domain, and the capabilities that satellite technology provides, communications, intelligence, navigation, and surveillance, are now so foundational to modern military operations that their denial or degradation would have effects far exceeding those of most conventional attacks. Accordingly, investment in advanced satellite technology is accelerating, driven both by the falling cost of launching orbital assets and by the growing sophistication of the threats those assets must be designed to withstand.

Several distinct technology trends are converging to reshape the satellite landscape. The miniaturization of satellite hardware has made it practical to deploy large constellations of small, relatively inexpensive platforms in low Earth orbit, providing persistent coverage capabilities that were previously only achievable with a handful of large, costly, and individually irreplaceable satellites. Ground systems are becoming increasingly autonomous, capable of monitoring and managing entire constellations without continuous human intervention. Propulsion technology is advancing in ways that enable more complex orbital maneuvers and, ultimately, deeper space missions. Very High Throughput Satellites are dramatically expanding the bandwidth available for military communications, with data transmission rates measured in hundreds of gigabytes or even terabytes per second.

The National Defence Policy outlines space as a priority strategic domain for Canada, including the need to protect space-based assets and enhance Arctic surveillance through satellite capabilities. The Department of National Defence states: “To allow the Canadian Armed Forces to communicate securely and reliably with (…) deployed forces, allies and partners, we will acquire a comprehensive worldwide satellite communication capability. Working with [Canadian] allies, [Canada] will jointly develop updated access to the satellite constellations that enable the military to operate effectively around the world, including by better defending its communications against jamming or disruptions by adversaries while deployed.” In addition, on October 1, 2025, the Canadian Space Agency announced various investments in Canadian companies and research organizations across Canada to support the development of Canadian space technologies in order for Canada to remain competitive, sovereign, and resilient in this segment.

7. Internet of Things

The IoT represents, at its core, the extension of network connectivity to the physical world, and in the defence context, this means connecting the full range of operational assets, from vehicles and weapons systems to supply depots and individual soldiers, into an integrated operational picture. The potential of this connectivity is substantial: real-time visibility across a distributed force, automated monitoring of equipment health, and faster, better-informed decision-making at every level of command.

Defence applications of IoT span the full operational lifecycle. Connected systems can support predictive maintenance, infrastructure management, and energy efficiency. Wearable sensors can monitor the physiological status of personnel, whilst connected logistics platforms provide commanders with precise visibility over the location and condition of supplies. At the strategic level, the aggregation of data across interconnected systems represents an ambition to create a continuously updated, comprehensive operational picture that transcends traditional domain boundaries.

The cybersecurity implications of this connectivity are, however, equally significant. Each additional connected device expands the potential attack surface available to adversaries, and the heterogeneity of IoT hardware, produced by a wide range of manufacturers across multiple jurisdictions, creates meaningful supply chain security risks. The Canadian Centre for Cyber Security has published guidance titled “Internet of Things (IoT) Security – ITSAP.00.012” as part of its Awareness series where it states the following about the impact of the IoT on critical infrastructure: “IoT is often used for industrial operations (e.g. manufacturing, energy, transportation, medical) that contribute to critical infrastructures (“CI“). IoT offers machine to-machine (sic) communications to enhance business processes by optimizing productivity, safety, sustainability, and cost. With these enhanced business processes, industrial operations and CI can be at greater risk when using IoT. Having multiple devices connected to systems that handle highly sensitive functions can risk external vulnerabilities affecting processes and provision. Multiple connections to devices, IT networks, and the internet, offer cyber criminals more angles to attack your systems from.”

8. Takeaways

The technologies examined in this bulletin offer a substantive but inevitably incomplete picture of the forces reshaping the global defence sector. They are, in the most literal sense, only the tip of the iceberg. Technologies such as directed energy weapons, hypersonic systems, quantum computing, and synthetic biology are advancing in parallel, and their convergence with the trends discussed here will produce second- and third-order effects that are extraordinarily difficult to anticipate.

What is clear is that the pace of change is not decelerating. If anything, the compounding nature of technological progress, where breakthroughs in one domain unlock possibilities in others, means that the rate of transformation is likely to intensify in the years ahead. Timelines from research to operational deployment are compressing. The gap between commercial innovation and military application is narrowing and the legal and regulatory frameworks tasked with governing these technologies are, in most cases, struggling to keep pace.

However, businesses or organizations operating in this space will be well-served to manage their legal compliance and protection strategies to ensure that they are able to continue to develop and manage such technologies at a pace consistent with the pace of such breakthroughs. Traditional legal regimes, such as intellectual property, can serve a useful role even they may not be able to keep up with the pace of technological development. Relatedly, understanding the rights and limits with respect to the collection, processing and managing of data of all types (confidential information, trade secrets, personal information, or other) can become a key strategic platform that can help a business propel itself in this fast-paced environment far beyond its competitors.

At this junction, developing fluency in these technologies and understanding their implications will be critical as the private and public sectors collaborate to develop and use the latest technologies to build a sovereign, resilient, and capable Canadian defense ecosystem in the years ahead.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

The foregoing provides only an overview and does not constitute legal advice. Readers are cautioned against making any decisions based on this material alone. Rather, specific legal advice should be obtained.

© McMillan LLP 2025