Which event took place first, Operation Undertone or the Battle of Leyte?
Battle of Leyte The Battle of Leyte in the Pacific campaign of World War II was the amphibious invasion of the Gulf of Leyte in the Philippines by American forces and Filipino guerrillas under the command of General Douglas MacArthur, who fought against the Imperial Japanese Army in the Philippines led by General Tomoyuki Yamashita from 17 October - 26 December 1944. The operation code named "King Two" launched the Philippines campaign of 1944–45 for the recapture and liberation of the entire Philippine Archipelago and to end almost three years of Japanese occupation.
Battle of Sidi Bou Zid The Battle of Sidi Bou Zid ("Unternehmen Frühlingswind" /Operation Spring Breeze) took place during the Tunisia Campaign from 14–17 February 1943, in World War II. The battle was fought around Sidi Bou Zid, where a large number of American units were mauled by German and Italian forces. It resulted in the Axis recapturing the strategically important town of Sbeitla in central Tunisia. The success at Sidi Bou Zid was reversed by April by counter-attacks by British and American forces. The battle was planned by the Germans to be a two-part offensive-defensive operation against US positions in western Tunisia.