Whats the movie that starts in australia and is about world war 1 or 2 it goes through egypt?

I saw this movie along time ago and have totally forgotten I just
remember the main parts.

It starts in Australia with some guy then he finds a friend they get
lost in the desert on there way around then find a town and join the
calvary then they run through egypt for training then are put on this
beach in the end the main guy risks his life to save a bunch of his
army men

does anyone know this movie I totally forget what its called...