Tips

ARMA
Never reload underfire, always get cover, or go prone at the very least.
Essential Guides
1 Mission planning and execution
2 Command
3 Infantry Movement
4 Navigation
5 Rifles
6 Handguns
7 Anti Tank
8 Sniping
9 Demolitions
10 Armour - Driving
11 Armour - Gunnery
12 Flight - Support
13 Flight - Transport
14 Vehicle - Driving
15 Vehicle - Gunnery