What are the 3 eras that have taken place during the phanerozoic eon

The idea of manifest destiny simply stated it was america's destiny to expand from the atlantic ocean to the pacific. the word "destiny" implies an idea that it was within our rights as a nation to expand. in a paragraph of 125+ words, explain what could be wrong with that idea.

Explain the importance of president harry truman's order to integrate the u.s. military and the federal government.

The had established a temporary government only 3 days earlier