Designers had to get creative in the early days of weaponizing motorized transportation. In one case during the First World War, that meant building a 37mm cannon into the middle of a V8 aero engine.
The fascinating graphic recording shown above depicts artillery sounds from the American front during World War I. It was recorded just moments before and after the ceasefire that would led to the end of the war.
Planes first appeared over a century ago, but they've changed considerably since then. What hasn't changed, however, is their role in controlling the air, striking, reconnaissance, and mobility — the roots of which go back back to the first World War.