Is declaring war a federal government, state government, or both?

According to thomas hobbes concept of the social contract, what do people exchange for the protection by the government?

When you accidentally commit a traffic violation,others are likely to be angered because they. a.can be endangered by the action b.have an unsympathetic disposition c.never make mistakes of their own

What enabled the drastic increase in us troop development to vietnam between 1964 and 1965?