Black Americans were permitted to serve in the Union Army for the first time, and nearly 200,000 would do so by the end of the war. the Emancipation Proclamation paved the way for the permanent abolition of slavery in the United States
The answer would be B Cuban missile crisis
Despite knowledge of the "Final Solution" and the desperate pleas of help, there was no real effort by the Allies to rescue the Jews.
The main Allied Powers were Great Britain, the U.S., the Soviet Union and China.