Operation Flashpoint: Red River is a first person shooter with a difference. It's an extremely tactical game that requires you to plan ahead before making any and control your squad with precision to ensure their safety on the battlefield.
With this in mind, it's wise to sit down and study the game manual before embarking on a mission - it will save your life, Marine. The most important tool in your arsenal is the Quick Command Radial (QCR). As the team leader you can call up the QCR at any point in the game and issue orders to your squad. These orders are broken down into Follow, Suppression, Tactics and Manoeuvre.
Each of these feature sub-orders such as telling a squad member to follow a specific target, flank left, hold fire or protect a certain target on the map. Mastering the QCR and the weaponry at your disposal throughout the campaign is paramount to survival in Operation Flashpoint: Red River.
Be sure to never rush into a firefight, it will most likely result in an instant death. Instead whenever you find yourself confronted with a target, press the R3 button to drop into a crouch, as this vastly improves your aim and chances of survival.