歩7.1 - 7th Infantry Regiment, 1st Batallion
西比利亞 - Siberia
出征紀念 - Expedition [departure for the front] Commemorative
In the center of obverse Imperial Military Reservist Association emblem
https://asiamedals.info/forums/imperial-military-reservist-association-badges.611/
Height 29 mm.
Width 22.5 mm.
Thickness 2.2 mm.
Weight 7.1 g.
Reverse
ポクラニーチナヤ守備記念 - Pogranichny [Pokuranīchinaya] Defense Commemorative
大正十年 - 1921
The history of Pogranichny /Пограничный/ village begins in 1898, when the Grodekovo station was founded on the CER and the village of...
https://en.wikipedia.org/wiki/Japanese_intervention_in_Siberia
Known as
西伯利亜出征/Siberia expedition
or
シベリア出兵 /Siberian Intervention
or
シベリア事變 /Siberian affairs
Badges and watch fobs
https://asiamedals.info/threads/badges-and-watch-fobs-of-siberia-expedition.13567/
siberia expedition history
siberia expedition in photographs
siberia expedition in photos
siberia intervention in photographs
siberian intervention
シベリア出征シベリア出征記念