OFP: Red River is almost not a game as much as it is a military simulator. As a squad leader, you need to order your squad around using an easy-to-use command wheel if you (and the rest of you allies) are to survive the harsh battlefields of Tajikistan.
Unlike Call of Duty or Battlefield, making a head-on cavalry charge to your enemies is a big no no as you can die in two hits. You wanna survive- Then you need to imitate the tactics the soldiers use in movies like Black Hawk Down and the Hurt Locker; you need to take cover and suppress their position, even if it means wasting ammo that won't hit them…because they wont' hit you either (hopefully).
My only major gripe with Red River is that the AI can occasionally be dumb but compensates with the superior marksmanship of your squadmates (these guys can make more kills than me).
You want a game that immerses you in a real-life battlefield- Well, get Operation Flashpoint: Red River.