Also, by cutting a few throats here and there at night, they can keep a whole regiment from getting any sleep. Worked in WWII.
My buddy's dad tells about the night his company was camped and several guys were standing around talking. He felt a very light touch fluttering around on his helmet, turned around, and there was no one there. A Gurka had snuck up behind them, and checked to see if he was wearing a German helmet. Since he wasn't, the Gurka left his throat intact, and disappeared without a sound. No one even heard him!
Scary!
Now the sergeant was given to some tall tales but I talked to his wife several times and she said he was very serious about the Gurkhas and we should believe when he talked about them.
This sergeant was in a platoon which was ambushed by the Japs when crossing a river. He and if I remember correctly only three others survived. He did by floating in the river which was running red for about a mile before he moved.
If it is true the Gurkhas are coming in, more power to them.