As a U.S. president, Harry Truman shared the anti-communist ideology that the country still holds to this day, and so when word of the invasion came to Truman, his first instinct was clear and his objective was set: Repel the invasion in order to stop the spread of communism. It was known that China shared the same ideology as North Korea, which caused Truman to take preventive measures and deployed a fleet in Taiwan to guard against an invasion there as well.