It would be the root word "C. Ambi-" that means “more than one”, since this is often used in the English language in words such as "ambidextrous"--meaning to have full use and ability in both hands.
In response to the Berlin wall the United States created the Berlin airlift. Supplies were sent on planes and dropped into Berlin. These supplies included things such as food and water.
The setting-up of a base at Guantanamo Bay. This happened after the war. The U.S. obtain Guam, the Philippines and
Puerto Rico from the Spanish. They did
not acquire Cuba but kept a lease on Guantanamo Bay. This was America’s entry into Imperialism.