In the interwar period, some military officers doubted that combustion-engine vehicles would replace horses in combat. Cavalry officers in the U.S. and U.K. argued against replacing horses with tanks, believing that heavy armored vehicles could not navigate hilly terrains effectively. In 1925, Field Marshal Sir Douglas Haig described airplanes and tanks as 'only accessories' to warfare, while Brigadier General Hamilton S. Hawkins criticized the rush to mechanization in 1938. These views contributed to the retention of mounted cavalry units until World War II, where the effectiveness of tanks against horses became evident.
Currently, major militaries, particularly the U.S., face a similar transition with the rise of unmanned vehicles. The ongoing conflict between Russia and Ukraine has highlighted the vulnerabilities of expensive tanks and aircraft, yet Western militaries continue to invest heavily in traditional systems. In 2024, Brigadier General Douglas Wickert of the U.S. Air Force stated that robotized warfare is still 'centuries' away, despite the Department of Defense requesting over $5 billion for the next generation of manned combat aircraft, the Boeing F-47, which is projected to cost $300 million per jet.
Other nations, including France and Germany, are also investing in legacy systems, with new tanks not expected until 2040 and China continuing to develop large aircraft carriers. The shift towards cheaper, unmanned systems is changing the dynamics of warfare, with drones and other automated technologies becoming increasingly prevalent. The U.S. military's focus on conventional manned equipment may divert funds from more efficient unmanned systems, which are less costly and easier to deploy.
Historically, militaries have been resistant to change, often sticking to familiar technologies. The use of unmanned systems, however, does not eliminate the need for human involvement; it simply changes the nature of that involvement. For instance, Ukraine has seen success by reducing the number of soldiers on the front line and utilizing remotely controlled systems, with drones reportedly responsible for a significant portion of Russian losses.
Debates continue over the role of autonomous vehicles in warfare, with historical context suggesting that technological advancements can redefine military strategies. The U.S. military's reliance on complex, expensive systems may hinder its ability to adapt to new forms of warfare, as evidenced by the challenges faced in conflicts in Iraq and Afghanistan. The increasing use of drones in various conflicts raises ethical questions about delegating life-and-death decisions to machines.
As military technology evolves, discussions about the implications of unmanned systems and the integration of artificial intelligence into warfare are essential. Countries that fail to recognize these changes risk becoming outdated, similar to those who defended the use of cavalry in the face of mechanization.