Because the Greek city-states were weak and disorganized to unite after the Peloponnesian War.
Answer:
Russia
Explanation:
most economic developed country
D I think Becouse non of them Becouse the environment changed
It meant that as soon as one country falls under communist control, another country would fall and so on. Vietnam at the time was split into North (communist) and South (being attacked by North) and the US didn't want communism to spread, reasoning that it might eventually come to the US if nothing was done.
