I think the activists campaigned
The significance of military action in WWII is that without taking this necessary action, (assuming you are referring to the U.S.) WWII could have had a very different outcome. The U.S. involvement in WWII was the cause of the bombing of Pearl Harbor. If they hadn't formed the Allied Forces to defeat Germany and Hitler, Germany very well might have won.
It was Philip II of Spain
Answer:
Are these the answer choices? I thought it was the Alien and Sedition Acts..