The United States shipped vast amounts of weaponry and supplies to Britain and the Soviet Union.Millions of US service personnel fought in Europe.<span>180,000 Americans lost their lives.
</span>American bombers destroyed German cities.Dwight D. Eisenhower commanded Allied forces on the western and Mediterranean fronts.
Migration is the right answer
Idk what is in the blank but what I know is that the ottomans broke through the Constantinople wall and had wars with the Byzantine empire. They then conquered it.