Digging tool. Aswell as an instrument of close combat warfare back in past wars of the United States. Basically a crude weapon aswell as a tool used to dig up the earth you set foot upon.

Many, but not as many as the enemy. Plus peace has to be within the beholder and I don't see many thinking on that aspect. Though the world tends to unfold. So maybe same be to the human race.

No. Though I guess if the back problem was so severe. You could possibly have problems breathing, thus making your throat sensitive and raw. Causing coughing. Though this would probably have to be very severe.