German Army's Blitzkrieg: Mastering Mobile Warfare in the 20s Blitzkrieg, or "lightning war," was a military strategy developed by the German Army in the 1920s and perfected during World War II. Rooted in lessons learned from World War I, it emphasized speed and surprise to achieve quick victories over adversaries. The key elements of Blitzkrieg included the use of fast-moving armored divisions, air support, and coordinated attacks that overwhelmed enemy defenses. General Heinz Guderian was inst