Identity of Old Classic WW2 Movie

I have been trying so hard to locate the name of a childhood favorite movie and would appreciate any help here.

The movie takes place in some pacific jungle setting. An American military company spends a lot of the movie trying to get to a location while being chased by a large force of Japanese soldiers. At the end, they reach a settlement clearing near a beach and set up a last stand. Wave after wave of Japanese attack from the jungle, and just as it seems they are going to be overran, a large contingent of American forces come in from beach landings and save what remains of the original force.

I could have sworn the movie was called Never So Few, but it’s not it.

I have loved old war movies since my childhood, and this was one of my very favorites. Again, any help would be so appreciated.