Who was the us president during world war i?

Iam not here to cheat, i just need to check my answer. how were incan commoners grouped within their social class? a. by gender and age b. by family rank c. by wealth and status d. by religious worship my answer is c. i believe this because slaves are at the bottom of the rank, whilst the emperor is above all.

How were returning african-american soldiers treated in american cities in 1919–1920?

What did president johnson risk violating the tenure of office act to the fire of his secretary of war