Question: In which war did Operation Undertone, a large assault by the US and French Armies and the Battle of Mindanao, fought by the US and allied Filipino guerrillas take place?

full_context: Document 1: Operation Overlord: Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful invasion of German-occupied Western Europe during World War II. The operation was launched on 6 June 1944 with the Normandy landings (Operation Neptune, commonly known as D-Day). A 1,200-plane airborne assault preceded an amphibious assault involving more than 5,000 vessels. Nearly 160,000 troops crossed the English Channel on 6 June, and more than two million Allied troops were in France by the end of August.
Document 2: Operation Veritable: Operation "Veritable" (also known as the Battle of the Reichswald) was the northern part of an Allied pincer movement that took place between 8 February and 11 March 1945 during the final stages of the Second World War. The operation was conducted by Field Marshal Bernard Montgomery's Anglo-Canadian 21st Army Group, primarily consisting of the First Canadian Army under Lieutenant-General Harry Crerar and the British XXX Corps under Lieutenant-General Brian Horrocks. The U.S. Ninth Army was incorporated into the 21st Army Group. The objective of the operation was to clear German forces from the area between the Rhine and Maas rivers, east of the German/Dutch frontier, in the Rhineland. It was part of General Dwight D. Eisenhower's "broad front" strategy to occupy the entire west bank of the Rhine before its crossing. "Veritable" (originally called "Valediction") had been planned for execution in early January, 1945 when the ground had been frozen and thus more advantageous to the Allies. The Allied expectation was that the northern end of the Siegfried Line was less well defended than elsewhere and an outflanking movement around the line was possible and would allow an early assault against the industrial Ruhr region.
Document 3: Lorraine Campaign: Lorraine Campaign is a term used by U.S. Army historians to describe operations of the U.S. Third Army in Lorraine during World War II from September 1 through December 18, 1944. Official U.S. Army campaign names for this period and location are "Northern France" and "Rhineland". The term was popularized by the publication of a volume of the same name by the U.S. Army in 1950. As written by the volume's author:
Document 4: South German Offensive: The South German Offensive is the general name of one of the final offensives of World War II in Europe. The offensive was led by the Seventh and Third armies of the United States along with the First Army of France. Soviet troops linked up with American forces in Czechoslovakia notably in the Battle of Slivice. The offensive was made by the US 6th Army Group to protect the US 12th Army Group's right flank and to prevent a German last stand in the Alps. However German resistance was much more fierce than in the north, which slowed the 6th Army Group's progress. However, by the end of April, many German divisions surrendered without a fight to the advancing American forces to avoid the inevitable destruction. The VI Corps of the Seventh Army linked up with the US Fifth Army, which fought through Italy, in the Alps as the Third Army advanced into Austria and Czechoslovakia, where it linked up with Soviet forces advancing from the east. Fighting continued a few days after the Surrender of Germany on 8 May, due to German forces fighting west to surrender to the Americans instead of the Soviets.
Document 5: Battle of Davao: The Battle of Davao was fought by Allied forces during World War II. It contained American and Philippine Commonwealth troops including locally organized guerrillas against the Japanese from May 3 to 18, 1945 at the city of Davao and its vicinity in the island of Mindanao in the Philippine Archipelago. It is part of Operation VICTOR V, an offensive operation against Japanese forces in Mindanao, and part of the campaign for the liberation of the Philippines during World War II. The battle was the decisive engagement of the Mindanao Campaign.
Document 6: Battle of the Visayas: The Battle of the Visayas was fought by U.S. forces and Filipino guerrillas against the Japanese from 18 March – 30 July 1945, in a series of actions officially designated as Operations Victor I and II, and part of the campaign for the liberation of the Philippines during World War II. The battle was waged to complete the recapture of the central portions south of the archipelago and secure them from remaining Japanese forces.
Document 7: Battle of Baguio (1945): The Battle of Baguio occurred between 21 February and 26 April 1945, and was part of the greater Luzon campaign during the Allied liberation of the Philippines at the end of World War II. During the battle, American and Philippine forces recaptured the city of Baguio on the island of Luzon from a Japanese occupation force. One of the last tank engagements of the Philippine campaign took place during the battle. Baguio later became the scene of the final surrender of Japanese forces in the Philippines in September 1945.
Document 8: Battle of Bataan (1945): The Battle for the Recapture of Bataan from 31 January to 21 February 1945, by US forces and Allied Filipino guerrillas from the Japanese, part of the campaign for the liberation of the Philippines, was waged to secure the western shore of Manila Bay to enable the use of its harbor and open new supply lines for American troops engaged in the crucial battle for the liberation of Manila.
Document 9: Battle of Mindanao: The Battle of Mindanao was fought by United States forces and allied Filipino guerrillas against the Japanese from 10 March - 15 August 1945 on the island of Mindanao in the Philippines in a series of actions officially designated as Operation VICTOR V. It was part of the campaign to liberate the Philippines during World War II. The battle was waged to complete the recapture of the southernmost portions of the archipelago.
Document 10: Western Allied invasion of Germany: The Western Allied invasion of Germany was coordinated by the Western Allies during the final months of hostilities in the European theatre of World War II. The Allied invasion of Germany started with the Western Allies crossing the Rhine River in March 1945 before fanning out and overrunning all of western Germany from the Baltic in the north to Austria in the south before the Germans surrendered on 8 May 1945. This is known as the "Central Europe Campaign" in United States military histories.
Document 11: Sixth United States Army Group: The Sixth United States Army Group was an Allied Army Group that fought in the European Theater of Operations during World War II. Made up of field armies from both the United States Army and the French Army, it fought in France, Germany, Austria, and, briefly, Italy. Also referred to as the Southern Group of Armies, it was established in July 1944 and commanded throughout its duration by General Jacob L. Devers.
Document 12: Spring 1945 offensive in Italy: The Spring 1945 offensive in Italy, codenamed Operation Grapeshot, was the final Allied attack during the Italian Campaign in the final stages of the Second World War. The attack into the Lombardy Plain by the 15th Allied Army Group started on 6 April 1945, ending on 2 May with the formal surrender of German forces in Italy.
Document 13: Borneo campaign (1945): The Borneo Campaign of 1945 was the last major Allied campaign in the South West Pacific Area during World War II. In a series of amphibious assaults between 1 May and 21 July, the Australian I Corps, under Lieutenant General Leslie Morshead, attacked Imperial Japanese forces occupying the island. Allied naval and air forces, centred on the U.S. 7th Fleet under Admiral Thomas Kinkaid, the Australian First Tactical Air Force and the U.S. Thirteenth Air Force also played important roles in the campaign. They were resisted by Imperial Japanese Navy and Army forces in southern and eastern Borneo, under Vice-Admiral Michiaki Kamada, and in the north west by the Thirty-Seventh Army, led by Lieutenant-General Baba Masao.
Document 14: Battle of Luzon: The Battle of Luzon, fought 9 January – 15 August 1945, was a land battle of the Pacific Theater of Operations of World War II by the Allied forces of the U.S., its colony the Philippines, and allies against forces of the Empire of Japan. The battle resulted in a U.S. and Filipino victory. The Allies had taken control of all strategically and economically important locations of Luzon by March 1945, although pockets of Japanese resistance held out in the mountains until the unconditional surrender of Japan. While not the highest in U.S. casualties, it is the highest net casualty battle U.S. forces fought in World War II, with 192,000 to 205,000 Japanese combatants dead (mostly from starvation and disease), 10,000 American combatants killed, and between 120,000 to 140,000 Filipino civilians and combatants killed.
Document 15: Operation Undertone: Operation Undertone was a large assault by the U.S. Seventh and French 1st Armies of the U.S. Sixth Army Group as part of the Allied invasion of Germany in March 1945 during World War II.
ground_truth: World War II