What is the song in Forrest Gump scene when he tries to rescue Jenny just before leaving for Vietnam it heard background they are walking on bridge?

The song playing in the background as Forrest and Jenny walk across the bridge just before he leaves for Vietnam is "Blowin' in the Wind" by Bob Dylan.

This song is iconic and its lyrics about peace and hope perfectly reflect the mood and the bittersweet parting of Forrest and Jenny.