Which two civilizations had such a great influence on later cultures they were called the "mother cultures"?

I believe the answer is: The Olmec and the Zapotec

Both of these civilizations left a considerable amount of artefacts which believed to be much more advanced compared to other civilizations in term of its arts and culture (such as statues, masks, and paintings). Because of this, many historians believed that the development of arts and culture on the rest of the world were influenced by the culture of olmec and zapotec

c. troops marched forward in close formation against newer, more accurate weapons

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.