Question: which battle took place first,  Battle of Belleau Wood or Operation Diadem ?
Sentence (from "Battle of Belleau Wood"): The battle was fought between the U.S. 2nd (under the command of Major General Omar Bundy) and 3rd Divisions along with French and British forces against an assortment of German units including elements from the 237th, 10th, 197th, 87th, and 28th Divisions.
Relevant evidence: No