Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: The Rock
His men's Last Stand which can be heard over the opening credits:
Hummel: "I won't let you down. I won't let you down, son.''
Marine: "They're not coming back for us, are they sir?"
Hummel's speech on his wife's grave:
Hummel: I miss you so much. There's something I've gotta do, Barb. Something I couldn't do while you were here. I tried. You know I tried everything, and I still don't have their attention. Let's hope this elevates their thinking. But whatever happens...(he takes Congressional Medal of Honor out of his pocket) please don't think less of me. (he sets the Medal on top of the headstone, leans over and kisses it, and then walks away).
The SEALs shooting it out with the Marines in the showers, and getting wiped out.