The correct answer to this open question is the following.
Truman’s big complaint as far as what the United States conceded to the Soviet Union was the following.
United States President Harry S. Truman's big complaint was that the Soviet Union was exerting to much pressure to control eastern European countries. After the Yalta Conference and the Postdam Conference, the Soviet Union exerted big influence and control over Poland and expanded its Communist form of Government into East Germany, Czechoslovakia, Rumania, Albania, and Hungary. We are talking about the beginning of the differences and confrontation that led these two countries into the Cold War years.
To discuss their grievances with the British government.
Answer: WHo is Captain John SMith
Explanation: John Smith was an English soldier, explorer, colonial governor, Admiral of New England, and author. He played an important role in the establishment of the colony at Jamestown, Virginia, the first permanent English settlement in America in the early 17th century.
There’s a good source on google if you search this but it’s easy to find on google:)