checkpoint a roadblock where vehicles are checked
GMV Ground Mobility Vehicle: a customised Humvee
IEDs Improvised Explosive Devices, home-made bombs triggered by remote control
intel short for intelligence
ISAF International Security Assistance Force — the NATO-led mission in Afghanistan
medevac short for medical evacuation: used to get injured troops to hospital for treatment
RPG short for rocketpropelled grenade
shrapnel a small piece of debris thrown outwards by an explosion
sitrep short for situation report: an update on the current state of things
wadi a channel for water