true or false 1. World War I was triggered by the assassination of the heir to Austria-Hungary's throne. 2. Beginning in the 1600s, the Romanov family ruled Russia for 300 years. 3. Joseph Stalin was known for bringing democratic reforms to the Soviet Union once he took power in 1924. 4. After the end of World War II, the Soviet Union installed communist governments in most Eastern European countries. 5. Solidarity was an organization that emerged in Czechoslovakia in the late 1960s to reform the communist government there. for each number.