Three stars for being innovative and setting the bar for realism in war violence. This set the trend of undersaturated, overexposed, dropped frame rate photography that's still being used almost two decades later. The massive opening scene is jaw dropping and more than worth the proverbial price of admission.
The rest of it is pure ultrapatriotic propaganda garbage of the first degree. It's the kind of thing that idiot children watch and idealize before they go and volunteer for the army, thinking that they can become men by going to war.
Contrary to this film's thesis, was doesn't build men up, it destroys them, body and soul. If you're looking for something better and more emotionally resonant, watch The Thin Red Line.