Possibly the AK47. It has always been cheap and reliable. It is a weapon which became infamous here in S.Africa.
I was fired upon years ago by people wielding AK47's on automatic. It was terrifying to say the least.
Well if I can be generic...a bladed weapon like a bayonet/sword etc...
Or with the advent of the industrial revolution.... perhaps the "humble" bullet.
Counter Intel, and HUMINT
Don't forget SIGINT.
I didnt, I just have a distaste for tech.
Depends on what you mean. For the US, its basically the Directorate of Operations, but its the force that collects information. I mean to say that information and misinformation are the most powerful weapons.
the well trained foot soldier/infantry/insurgent