These are the events that sparked the World War I:
The assassination of Archduke Franz Ferdinand angered Austria.
The nationalism of Serbia increased tensions in the Balkan peninsula.
Alliances caused a chain of events that pulled each country into war.
At the start of World War 2, America is the country that maintained the isolationist policy.
Answer:
Apply for a US passport.
Explanation:
Passports are only necessary if you are traveling out of your home country.
