Why did General Douglas MacArthur struggle to hold of us positions in the?

General Douglas MacArthur struggled to hold U.S. positions during the Korean War due to several factors, including the overwhelming numerical superiority of North Korean forces and their surprise attack in June 1950. Additionally, logistical challenges, inadequate reinforcements, and the rapid advance of enemy troops strained his command. The lack of preparedness and resources further complicated efforts to maintain defensive positions, ultimately leading to significant setbacks for U.S. and allied forces.