Misc: In 1899 Treaty of Paris ratifies; Spain cedes ---------- to US?

Questions

In which US state is Quantico, home to an FBI training and research facility and a similar one for the Marine Corps?

Which composer and pianist became Prime Minister of Poland in 1919?

What was the name of the Soviet Security Service immediately after the October Revolution?

Of which country was Admiral Miklos Horthy the political leader during World War 2?

Which other left wing faction did the Bolsheviks defeat to take control after the Russian revolution?