Infantry refers to soldiers who fight on foot, carrying their own weapons and equipment. Throughout history, infantry have formed the backbone of armies, marching into battle with rifles, shields, swords, or spears depending on the era.

In medieval times, knights on horseback got more glory, but infantry did much of the actual fighting. A Roman legion's strength came from its disciplined infantry formations. During the American Revolution, infantry soldiers on both sides marched for miles, set up camp, and fought in long battle lines.

Modern infantry soldiers still walk or run into combat zones, though they might arrive by helicopter, truck, or armored vehicle. They clear buildings, patrol streets, and hold positions that vehicles and aircraft cannot. Infantry training emphasizes physical toughness, teamwork, and the ability to operate in difficult terrain where tanks or planes would be useless.

The phrase “boots on the ground” refers to infantry, emphasizing that controlling territory ultimately requires people actually standing on it. While technology has changed warfare dramatically, infantry remain essential because some jobs require human judgment, adaptability, and the ability to navigate complex situations that only a person on foot can handle.