What film is this.... one for the hardcore movie buffs....

In the mid 90's I remember watching some War film on RTE, based on a true story about a platoon that had a sucessful mission during either the Korean or Vietnam war.







RTE also showed the sequel the following night about a later mission, however they never returned from their mission this time. I think they were planning to use tiny submarines in the second mission.



I remember that the search party sent to locate them found Bananas buried somewhere along the route and were able to tell that the men had been there a certain number of days previously.




Any ideas of the title folks, not easy as my memory is so vague....