Just add 750 and 400 to get 1150. 5th century means 400 yrs after bce.
In April 1952, Harry Truman nationalized the steel industry to prevent the workers' strike, that was scheduled to begin that month. It led to the famous Steel Seizure Case, the first case in the U.S. court history to limit the power and entitlements of the president of America. The jury took a stand that the president doesn't hold it in his power to interfere with private property.
The presence of Communist governments in the Western Hemisphere.