What was an effect of the treaty of versailles which ended world war i?

Why did some states believe they had the power to overturn federal laws?

Brainliestttme : ) how did the soviet union try to maintain control?

Which impact did the civil war have on the spread of disease in texas a. disease decreased bc people left the area to fight in the war b. disease increased bc medicine was in short supply. c. disease increased bc many new diseases were brought to the area d. disease decreased bc confederate doctors distribute new medicines to local communities