They needed to maintain a certain level of strength for "duties".
The government mostly assisted business interests and sent in militia to put down strikes, although sometimes negotiations would happen.
Article IV section 2 of the United States Constitution includes the Privileges and Immunities Clause. However, in addition to this, it also contains the Extradition Clause and the Fugitive Slave Clause.
The Extradition Clause states that a person charged in any state with treason, felony or other crime and fleeing from justice is found in another state, may be extradited to the state from which he fled on request of the executive authority of that same state.
The Fugitive Slave Clause stated that fugitive slaves who scaped to a different state were not to be liberated, but to be returned to their masters. However, the clause was rendered moot when the Thirteenth Amendment abolished slavery.
True. There were many revolts within and outside of the government of England which hampered its establishment of colonies in other parts of the world. They were also in fear of the Spaniards because of their stronger colonization tactics and multiple successful voyages. Spain was also one of the strongest trade empires during those days, which puts them in great power compared to England.
The Treaty of Versailles was the Treaty ending WW1 placing all "war guilt" on Germany.
War guilt clause: Germany forced to accept blame for starting WW1