The US Army has a long history of adapting to change and learning from past experiences. Leaders like General Pershing and General Marshall emphasized the importance of well-trained soldiers, forward-thinking strategies, and competent leadership. The key to success on the battlefield lies in maintaining a balance between quality soldiers, effective doctrine, the right mix of forces, tough training, modernization, and strong leaders. Lessons from World War II and the Korean War highlight the importance of being prepared for peace to avoid the heavy cost of war.