What did president truman do when north korean troops crossed into south korea for the first time

He passed a resolution condemning the attack and calling on the North to cease hostilities and return north of the 38th parallel. And with the endorsement of Congress he ordered urgent military support for Rhee

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.