The stalemate of trench warfare in World War I was finally broken by the tank and self-propelled gun, and Germany capitulated. These weapons came fully into their own in World War II, and combined with the tactics of blitzkrieg, gave Germany early supremacy. Ground support aircraft such as Stuka dive-bombers were used to devastating effect. The Soviet response to this combination was the T-34 tank whose 76 or 85mm gun could fire high explosive shells as well as armor piercing rounds.
Technological advances in the 20th century changed how wars were fought. Thanks to the use of planes and tanks, combat emerged out of the trenches. This entry in the Encyclopedia of Modern Armor series focuses on the use of the titular engines of war, covering everything from World War II classics such as the German Stuka to more modern weapons.