Regular readers of this website will know that a staggering amount of men’s clothing finds its origin in the barracks. Even suits are a legacy of military uniforms—as is almost any menswear style that doesn’t trace its roots back to workwear instead. The ultimate reason for this is pretty simple: A huge amount of funding goes into developing the most comfortable, functional designs for active combat, and when those conflicts mercifully end, those newly-developed, cutting edge garments—and the innovations that came with them—find their way into wider circulation. Classic brands, repro nerds, indie darlings and luxury houses alike have always riffed on these designs, but in 2026, there’s a renewed buzz around military jackets specifically. The field jacket is showing up in spring collections all over the world, and reports from previews of the upcoming Autumn-Winter collections reveal that energy is only going to increase. But before we all start drowning under vague references to “military inspiration” and “technical fabrics,” it felt important to define what, exactly, all of those distinctive design details are about—and …