According to legend, no one was allowed to ride the horse Babieca after which Spanish hero died in 1099?

After which city fell on April 2-3, 1865 did Union troops raise the U.S. flag over the Confederate capitol? After which city's Great Fire of 1666 did Nicholas Barbon open one of the first fire insurance companies? After which country declared independence in 1948 did the armies of Transjordan and Iraq invade? After which Czech writer denounced the Soviet invasion of his country in 1968 were his plays banned? After his release from federal prison in 1939, which gangster, too ill to regain control of the Chicago mob, retired to… After whose speech at the 1896 national convention did the Democrats come out in favor of silver? After whose troops entered Warsaw in 1806 did Poland exist as the Grand Duchy of Warsaw? After how many days of captivity did Iran release the 52 American hostages on January 20, 1981?