Trade. Greece's main exports were olive oil, wine, pottery, and metalwork. Imports included grains and pork from Sicily, Arabia, Egypt, Ancient Carthage, and the Bosporan Kingdom.
Explanation: for more infomation aka "source" is https://en.wikipedia.org/wiki/Economy_of_ancient_Greece
Fighting in Vietnam started in 1954 when technically France tried to reassert its colonial claims to Indochina, although Japan had claims as well. It was primarily a colonial beginning.
