Did the united states join in the battle of britain

What form of government is powers of states?

Which statement describes the impact of the 21st amendment?

Article ii "each state retains its sovereignty, freedom, and independence, and every power, jurisdiction, and right, which is not by this confederation expressly delegated to the united states, in congress assembled."—articles of confederation which of the following principles of american democracy does this quote best represent? social contract natural rights federalism rule of law