Operation Dexterity

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Operation Dexterity was an Allied campaign in the South West Pacific during World War II, aimed at driving Japan off New Britain as part of the broader Cartwheel plan to isolate Rabaul and move toward the Philippines. From December 15, 1943, to March 9, 1944, American and Australian forces (about 19,000 troops) fought about 10,500 Japanese defenders and won.

Key actions
- December 15, 1943: Amphibious landing at Arawe.
- December 26, 1943: Landing at Cape Gloucester in the northwest of New Britain.
- December 30, 1943: Capture of the Tuluvu airfield.
- January 2, 1944: Amphibious landing at Saidor.
- March 1944: Final landing at Talasea, ending March 9, 1944.

Forces and leadership
- Allied leaders: General Douglas MacArthur (overall commander in the Southwest Pacific) and General Walter Krueger (ground forces commander).
- Japanese leaders: General Yasushi Sakai (17th Division) and Major General Iwao Matsuda (commanded troops around Cape Gloucester).
- Strength: Allies about 19,000; Japanese about 10,500.
- Casualties: Allied roughly 500 killed; Japanese about 4,500 killed.

Environment and challenges
- The campaign took place in rugged jungle terrain with hills and swamps, high heat, heavy rains, and malaria.
- Allied reconnaissance, including the Alamo Scouts, helped map defenses before landings.

Outcome and significance
- The Allies achieved victory, advancing toward their goal of stopping Japanese expansion and setting the stage for future operations toward the Philippines.