The Fugitive Slave Act of 1850 allowed local governments to capture what . It also punished the people who helped them. Because of this law, whitch states were forced to enforce slavery.

1)runaway slaves and return them to their owners.

2) Northern states of America were forced to enforce slavery

Explanation:

The Fugitive Slave Acts  OF 1850, was a  federal law that allowed for the capture of runaway slaves and thier  return within the territory of the United States which authorized  local governments to seize and return escaping slaves  to their owners and penalized  anyone who aided their escape.

--- The Northern states provided a safe haven for runaway slaves and were termed  free states, The Southern Politicians were concerned with the development from the Northern states and then introduced a Constitution---Fugitive Slave Clause to force the states to enforce slavery in which no person held to service  can be released if they escaped to a free state. Due to the many oppositions to the  Fugitive Slave Acts  OF 1850, the law later become  unenforceable in certain Northern states.

d.)   when the us left nato after the end of the cold war and they had to evolve to focus on more humanitarian measures with the smaller budget