Answer:
Gorbachev
Explanation:
Gorbachev and his team of economic advisors then introduced more fundamental reforms, which became known as perestroika (restructuring).
World War I, which lasted through Jul 28, 1914 to Nov 11, 1918.
https://www.history.com/topics/world-war-i/world-war-i-history
Info at the link
Herman Cortes set off to explore Cuba in an expedition where he strategically aligned some native people against others to overthrow them, There in Cuba he helped colonize.
New York, New Jersey and Pennsylvania are states in the Highland region.