Answer:
In 1819, the slave holding territory of Missouri applied for admission to the Union. Northern states opposed it, feeling that Southern slave holding states held too much power already. ... This had given the South an advantage in Congress.
Explanation:
Signs point to North Korea unilaterally launching the invasion. It was not helpful for the USSR and was at a very bad time for the PRC since the war immediately shut down plans to invade Taiwan.
The U.S., especially after Chinese troops entered the war, viewed it as a united and aggressive communist bloc brashly taking over one more country and likely to try more if not resisted. US defense spending shot back up to wartime levels (though far from the WWII peak) and stayed there.
China also viewed it as a feeler for aggression that would go further if not resisted. Both countries were overinterpreting local issues as global ones.
The dramatic reverses were all in the first year, followed by two years of stalemate before the armistice.
In the Battle of Trenton (December 26), Washington defeated a formidable garrison of Hessian mercenaries before withdrawing. A week later he returned to Trenton to lure British forces south, then executed a daring night march to capture Princeton on January 3.
