It was a physical barrier. Literally a concrete wall.
Answer:
During the World War 1 the US were allies to the countries affected during the War by supplying food and giving them aid by send troops and other resources which helped the allies win the war
Explanation:
WWI was largely a stalemate until the US entered the war. Its large population and many resources tipped the balance and allowed the Allied Powers to win the war soon after the US entered. ... The American troops were fresh because we didn't join the war until April 1917. Our rested troops were a big asset for the Allies.
May 28, 1754: The first battle Washington defeats the French in a surprise attack. His troops retreat to Great Meadows and build Fort Necessity. July 17, 1754: Washington's resignation Blamed for Fort Necessity, Washington resigns. He will later return as a volunteer under British authority. (hopefully its helpful)