How did presidents use military force to expand executive powers in the 20th century?

In the 20th century, U.S. presidents increasingly employed military force to expand executive powers, often bypassing Congress. Notable examples include the use of military interventions in Korea and Vietnam, where presidents asserted their authority to act decisively in foreign affairs without formal declarations of war. This trend was further solidified by the War Powers Resolution of 1973, which sought to limit presidential war-making powers but ultimately underscored the executive's ability to engage militarily in conflicts. As a result, presidents have often claimed a broader interpretation of their constitutional powers concerning military action, shaping the balance of power between the executive and legislative branches.