How have we learned about sargon of akkad why have historians had a hard time learning more about sargon and the city of akkad

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

Neutrality is no longer feasible or desirable where the peace of the world is involved and the freedom of its peoples. —war message to congress, woodrow wilson how does wilson use the meaning of the word freedom to justify war?

Which military outfit is near the city of lawton, oklahoma?