patriotic movement
Refers to organized activities or campaigns promoting patriotism, often in a political or social context.
In his youth, he participated in a patriotic movement.
愛国心 is the feeling of patriotism itself, while 愛国運動 is the organized movement or campaign based on that feeling.
Compound of 愛国 (patriotism) + 運動 (movement). The exact historical derivation is uncertain; the term is a straightforward modern compound.