Leaving Russia we asked for the hottest chili peppers and these small green peppers were as hot as hell. I tried to find more about their origins but couldn’t. But when it comes to hot it doesn’t take much to burn your soft tissue in your mouth.

Bhutan: https://mesubim.com/2014/05/15/2225-datil/

See the Scoville Index: https://en.wikipedia.org/wiki/Scoville_scale