Yes. But there are times when soldiers know that they will die on a mission but the mission, in context of the whole of the effort, is more important than there life.This doesn't frame up the circumstance appropriately. Didn't Jesus supposedly know he was bound for death? Now consider your "person on the battlefield" - does any soldier know for certain that he is going to die on the battlefield? No. In fact, if anything every single person on that battlefield (unless a suicide bomber or kamikaze of some form) wants desperately to be one of the ones left standing. However, to fulfill his destiny, I would think Christ would have had to even go so far as to desire death on some level, to consecrate the sacrifice. No?
Of course there is so much more to it and we are barely scratching the surface in context of Christian thought.
However, specifically in this OP, it is hard pressed to be called a suicide.