I believe that the United States was and wasn't justified to drop the atomic bombs on Hiroshima and Nagasaki
Explanation:
It was justified because Japan realized a surprise attack at Pearl Harbor in Hawaii, after two hours of bombing, 18 U.S. ships were sunk or damaged, 188 U.S. aircraft were destroyed, and 2,403 people were killed, all of this happened while the U.S. and Japan were officially engaging in diplomatic negotiations for possible peace in Asia.
It wasn't justified because the two bombings killed between 129,000 and 226,000 people.
This historian would be using the skill of "comparative analysis," since he or she is comparing a wide variety of sources to draw a conclusion between them as a group.
Answer: In February 1946, George F. Kennan's transmission from Moscow was published in the Kennan-Roosevelt Telegram, which is now known as the Kennan-Roosevelt Telegram.
Explanation: Kennan's "Long Telegram" was the cornerstone of the United States' "containment" strategy against the Soviet Union for the duration of the Cold War.