Dear John (2010)

While on leave, U.S. soldier John Tyree (Channing Tatum) falls for Southern college student Savannah (Amanda Seyfried), whose ideals and heartfelt principles are at once attractive and unfamiliar. But their love is put on hold when terrorist attacks prompt John to reenlist. Now, handwritten letters hold the lovers together. Lasse Hallstrom directs this modern romance based on the novel by Nicholas Sparks.