This had brought the United States into the War. If not for the Americans many events like D-Day or the Atom bombs strike would not have happened. Ultimately this would but Britan in Ruins and leave Russia as the only support to destroy the germans. From their, Japan could attack Russia forcing it to surrender. Leaving the Axis in a worldwide victory
Answer:
Explanation:
It was at the end of WW1 and it became more deadly because it was caused by a mutated virus spread by wartime troop movements.
