sabretache
A leather pocket or pouch worn hanging from a cavalry officer’s belt.
historical
There were five buttons blown off my dress jacket; the slings of my sabretache were cut off, but my sword belts were not touched.
Where it comes from
From French sabretache, from German Säbeltasche, from Säbel (“sabre”) and Tasche (“pocket”).
Adapted from the Wiktionary entry sabretache (CC BY-SA 4.0).