Complex sentence: Eisenhower also laid out a plan for an international agreement that authorized the U.N. to "inspect" any nations willing to submit to its authority for signs of increased militarization and aggressive action.
Split into simpler sentences: Eisenhower also laid out a plan for an international agreement that authorized the U.N. to "inspect" any nations willing to submit to its authority. The U.N. would inspect the countries for signs of increased militarization and aggressive action.