The Battle of Bita Paka (11 September 1914) was fought south of Kabakaul, on the island of New Britain, and was a part of the invasion and subsequent occupation of German New Guinea by the Australian Naval and Military Expeditionary Force (AN&MEF) shortly after the outbreak of the First World War. Similar to New Zealand's operation against German Samoa in August, the main target of the operation was a strategically important wireless stationone of several used by the German East Asiatic Squadronwhich the Australians believed to be located in the area. The powerful German naval fleet threatened British interests and its elimination was an early priority of the British and Australian governments during the war.

After an unopposed landing, a mixed force of German reservists and half-trained Melanesian police mounted a stout resistance and forced the Australians to fight their way to the objective. After a day of fighting during which both sides suffered casualties, Australian forces captured the wireless station at Bita Paka. The battle was Australia's first major military engagement of the war and the only significant action of the campaign; in its aftermath the remaining German forces on New Britain fled inland to Toma. Following a brief siege there the German garrison capitulated, ending resistance to the Australian occupation of the island.

New Britain (Tok Pisin: Niu Briten) is the largest island in the Bismarck Archipelago, part of the Islands Region of Papua New Guinea. It is separated from New Guinea by a northwest corner of the Solomon Sea (or with an island hop of Umboi the Dampier and Vitiaz Straits) and from New Ireland by St. George's Channel. The main towns of New Britain are Rabaul/Kokopo and Kimbe. The island is roughly the size of Taiwan. While the island was part of German New Guinea, it was named Neupommern ("New Pomerania").

In common with most of the Bismarcks it was largely formed by volcanic processes, and has active volcanoes including Ulawun (highest volcano nationally), Langila, the Garbuna Group, the Sulu Range, and the volcanoes Tavurvur and Vulcan of the Rabaul caldera. A major eruption of Tavurvur in 1994 destroyed the East New Britain provincial capital of Rabaul. Most of the town still lies under metres of ash, and the capital has been moved to nearby Kokopo.