Question: How many assaults were there in the battle that Thomas E. McCall received the Medal of Honor for his actions during?
Sentence (from "Battle of Monte Cassino"): The Battle of Monte Cassino (also known as the Battle for Rome and the Battle for Cassino) was a costly series of four assaults by the Allies against the Winter Line in Italy held by Axis forces during the Italian Campaign of World War II.
Relevant evidence: Yes