original_query: What were the reasons for the 442nd Regiment to be called the "Purple Heart Battalion"?
query: What were the reasons for the 100th Battalion to be called the "Purple Heart Battalion"?
answer: The 100th Battalion, later the 1st Battalion of the 442nd Regimental Combat Team, was nicknamed the "Purple Heart Battalion" due to its high casualty rate at Anzio and Monte Cassino.