The bubonic plague followed trade routes
The increased use of the trade routes ensured that the disease spread throughout the world.
Japan violated the League of Nationâ??s terms of war by invading Manchuria
Earliest human migrations and expansions of archaic and modern humans across continents began two million years ago with the migration out of Africa of Homo erects.
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The United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki<span> on August 6 and 9, 1945, respectively, during the final stage of </span>World War II. <span>The </span>two<span> bombings, which killed at least 129,000 people, remain the only </span>use of<span> nuclear weapons for warfare in history.</span>
