The usa fought in vietnam because southern vietnam was not communist while the north were pushing for communism so the answer would be d to stop the spread of communism
Historical Cycle or sometimes a recurring theme
Answer:
D
Explanation:
he mostly gave it around to churches and libraries and not just in the u.s
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
