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?
Context: 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. The Battle of the Marne (French: Première bataille de la Marne , also known as the Miracle of the Marne, "Le Miracle de la Marne") was a World War I battle fought from 6–10 September 1914.  It resulted in an Allied victory against the German armies in the west.  The battle was the culmination of the German advance into France and pursuit of the Allied armies which followed the Battle of the Frontiers in August and had reached the eastern outskirts of Paris.  A counter-attack by six French armies and the British Expeditionary Force (BEF) along the Marne River forced the Imperial German Army to retreat north-west, leading to the First Battle of the Aisne and the Race to the Sea.  The battle was a victory for the Allies but led to four years of trench warfare stalemate on the Western Front. 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. The Nivelle Offensive of 1917, was a Franco-British offensive on the Western Front in the First World War.  The French part of the offensive was intended to be strategically decisive, by breaking through the German defences on the Aisne front within 48 hours, with casualties expected to be around 10,000 men.  A preliminary attack was to be made by the French Third Army at St. Quentin and the British First, Third and Fifth armies at Arras, to capture high ground and divert German reserves from the French fronts on the Aisne and in Champagne.  The main offensive was to be delivered by the French on the Chemin des Dames ridge (the Second Battle of the Aisne, "La bataille du Chemin des Dames" , "Seconde bataille de l'Aisne" and "Doppelschlacht Aisne-Champagne" ), with a subsidiary attack by the Fourth Army (the Third Battle of Champagne, the Battle of the Hills or Battle of the Hills of Champagne).  The final stage of the offensive was to follow the meeting of the British and French armies, having broken through the German lines, with a pursuit of the defeated German armies towards the German frontier. 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. The Cabanatuan American Memorial, formally known as Camp Pangatian, is a World War II memorial located near Cabanatuan City, Philippines.  Camp Pangatian was a military training camp for twenty years until it was converted into a concentration camp for allied prisoners of war during the Japanese occupation.  The liberation of Camp Pangatian is known as the most successful tactical rescue mission ever executed by the American military.  They were aided by Filipino guerrillas who were fighting the invaders.  The Raid at Cabanatuan was the result of both the Bataan Death March and Prisoner-of-war camp.  Although the Bataan Death March was a significant historical event, the establishment of its memorial in Cabanatuan was not mentioned in any major U.S. news outlets.  This tactical operation was immortalized in the movie The Great Raid.  The memorial was dedicated on April 12, 1982 by the survivors of the Bataan Death March and the prisoner-of-war camp at Cabanatuan during World War II.  The memorial has been maintained by the American Battle Grounds Commission since 1989.  Prior to this, it was maintained by the American Battle Monuments Commission. 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. The Kedatuan of Dapitan was an ancient Philippine polity once based at Bohol at Tagbilaran Strait.  Bohol's first indigenous people settled in the Anda peninsula.  These people came from northeast Mindanao.  These people were responsible for the Anda petrographs which are one of the most important indigenous rock writing in the country.  Around the 12th century, a group of people from Northern Mindanao settled in the strait between mainland Bohol and the island of Panglao.  Those people came from a nation in northern Mindanao called Lutao (probably the animist kingdom of what will soon be the Islamic Lanao).  Those people established the Kedatuan of Dapitan in western Bohol because the true indigenous people of Bohol in the Anda peninsula and nearby areas were not open to them, forcing them to establish settlement in the western part of the island.  The kedatuan was first built with hardwood on the soft seabed.  It engaged it trade with nearby areas and some Chinese merchants.  The Jesuit Alcina tells tales about a rich nation he called the 'Venice of the Visayas', pointing to the Kedatuan of Dapitan at that time.  The Jesuit also tells of a princess named Bugbung Hamusanum, whose beauty caused her suitor, Datu Sumangga, to raid parts of southern China to win her hand.  By 1563, before the full Spanish colonization agenda came to Bohol, the Kedatuan of Dapitan was at war with the Sultanate of Ternate in the Moluccas (who were also raiding the Rajahnate of Butuan).  At the time, Dapitan was ruled by two brothers named Dalisan and Pagbuaya.  The Ternateans at the time were allied to the Portuguese.  Dapitan was destroyed and Datu Dalisan was killed in battle.  His brother, Datu Pagbuaya, together with his people fled back to Mindanao and established a new Dapitan in the northern coast of the Zamboanga peninsula.  The new Dapitan eventually was incorporated by the Spanish.  Pagbuaya's son, Manooc was among those who sided with the Spanish.  He converted to Christianity and aided the Spaniards in the conquest of Islamic Manila and the Camarines area in Luzon.  The people of Dapitan also assisted the Spanish in the conquest of Northern Mindanao.  Eventually, the Dapitans took their vengeance against the Ternateans when Manooc's cousin, Laria, guided the Spanish in their invasion of the Moluccas (Ternate). 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. 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.
Answer: World War II