"Jochi Khasar, the Khan’s brother, was known far and wide for his ability to hit his targets from more than nine hundred alda, a traditional Mongolian unit of measurement equal to the distance between the tips of the middle fingers of two outstretched arms."

Hrrm 900 Alda is somewhere in the ballpark between approximately 1440 meters and 1620 meters.

That seems a bit far.

https://chat.openai.com/share/983ebd1b-58a7-43b1-8c06-cf6a25... (code interpreter)