In Its a Wonderful Life how does harry save everybody's life on?

In "It's a Wonderful Life," Harry Bailey saves everyone by serving in the military during World War II. He earns a Medal of Honor for his bravery when he rescues troops from drowning, which ultimately impacts the community positively when he returns. His actions highlight the theme of selflessness and the ripple effect one person's choices can have on the lives of many others. This culminates in George Bailey realizing the profound impact he has had on his community through his own sacrifices.