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?
Sentence (from "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.
Relevant evidence: Yes