The war in Iraq is (mostly) over. The war in Afghanistan is (slowly, incompletely) ending. And yet the new battlefield robots produced by a decade of war are having an easier transition to peacetime than some human veterans. The robots are simply trading their fatigues for the blue uniforms of American police.

Long before Predator drones and PackBots patrolled Iraq and Afghanistan, unmanned systems were used in combat—as far back as WWI and WWII, in fact. Here's a quick look at the coolest of the old-timey warbots: