More fucked logic from you, eatshit? When you are a smaller, less equipped fighting force with no air force, and armour, of course u have to use guerilla tactics like IEDs. That is why the coalition casualties are mostly caused by this. U really expect the Taliban/ISIS etc to engage US and Coalition forces in a straight up firefight with small arms? They are not that crazy to engage the US like this. On the other hand, you should aak what is the percentage of Taliban/ISIS casualties caused by small arms fire. I would say that would be a lot higher, probably over 50%. In urban fighting, the US will not use IEDs or booby trap explosive devices, nor will they normally use artillery or air power for fear of collateral civilian damage. So, they have to go door to door with small arms, hence casualties they inflict on the enemy would likely be small arms. Even in non urban fighting when the US employs arty and airpower, they still use infantry and small arms to engage their enemy. Only an idiot thinks small arms is overrated.