Which Russian empress extended serfdom into Ukraine in the late 18th century?

After Charles V, which priest is the next person named in the 1521 Edict of Worms? After circling Earth some 1,400 times, which first Soviet satellite burned up as it fell back in 1958? After coming to America in 1620, William Brewster served as religious leader of which colony? After completing "The Prince" in 1513, which writer turned to "Discourses on the First Ten Books of Livy"? After conquering which African land around 1650 B.C. did the Hyksos introduce horses and chariots? After much bloodshed, which conquistador founded the city of Lima, Peru, in January 1535? After criminal activities by which secret society was Oklahoma placed under martial law in September 1923? Starting in December 1944, what was Dwight Eisenhower's rank?