Question: Which battle took place first Operation Diadem or Battle of the Wilderness ?
Sentence (from "Battle of the Wilderness"): The Battle of the Wilderness, fought May 5–7, 1864, was the first battle of Lt. Gen. Ulysses S. Grant's 1864 Virginia Overland Campaign against Gen. Robert E. Lee and the Confederate Army of Northern Virginia in the American Civil War.
Relevant evidence: Yes