September 15 in Military History — On This Day

⚔️📍 Peleliu, Palau Islands, Pacific1944

Battle of Peleliu — America's Bloodiest Pacific Assault

U.S. Marines landed on Peleliu against Japanese defenders using a new tactic: abandoning beach defense to fight from an elaborate tunnel system in the island's coral ridges. Predicted to take four days, the battle lasted 73 days.

Peleliu's horrific casualties for a strategically questionable objective led some historians to argue it was an unnecessary battle — making it the most controversial operation of the Pacific War.

Outcome

American victory after 73 days; 10,000+ casualties

Casualties

10,000

Battle of Inchon

Against the advice of nearly every senior military planner, General MacArthur executed an amphibious assault at Inchon — a port with treacherous tidal conditions requiring a 32-foot tidal swing and offering a narrow 12-hour window. The 1st Marine Division and Army X Corps struck directly at the North Korean rear, cutting their supply lines. The boldness of the operation achieved complete strategic surprise. MacArthur had wagered his reputation and won brilliantly.

Inchon was one of the most audacious and successful amphibious operations in military history. It instantly reversed the strategic situation, cutting off North Korean forces besieging Pusan and forcing them into a chaotic retreat. MacArthur's gamble vindicated his unconventional operational genius.

Full battle details →