• Leapfrogging, or island-hopping was a strategy used during World War II around 1942 by U.S. forces.
• U.S. forces would land on Japanese-controlled islands disrupting supply lines and isolating forces.
• After that point they would establish military bases and infrastructure to land on another island.
• They would pass by strategically unimportant islands.
• This strategy managed to take U.S. troops very close to the Japanese mainland.