What principle does the Supremacy Clause establish?

- "bill clinton ( the 42nd u.s. president, served in office from by low unemployment, declining crime rates and a budget surplus. during clinton's second term, the u.s. economy was healthy, unemployment was low and the nation experienced a major technology boom and the rise of the internet."

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.