The answer is be the place where two or more bones meet
Historians should use more than one source because, if they do it will make there knowledge more creditable
Answer:The United States drops an atomic bomb on Hiroshima. The Soviet Union declares war on Japan and invades Manchuria. The United States drops an atomic bomb on Nagasaki. Having agreed in principle to unconditional surrender on August 14, 1945, Japan formally surrenders, ending World War II.
Explanation:
That is true. By making travel on rivers more efficient.