The 28th of October is
Gunma's Prefectural Citizen's Day!
Designated based on the first time the name "Gunma" was used, due to the abolition of the han system back in the 4th year of the Meiji era (1871)!
while fighting against the Totsuigi army, who reported 7000 casualties.The rumors say that only two Gunmaa warriors sustained light injuriesGunmaa border patrol warrior attire (artist depiction)
Most definitely based on this imageThe Gunmaa Army...
Sure has a terrifying fighting prowess...Wearing it properlyGunmaa's special features!
An unexplored region somewhere within Japan.
Probably not the same as the prefecture of Gunma... maybe.
Since nobody comes alive out of that place, there is not a lot of reliable information.
Their friends are the prefectures of Tochigi and Nagano.
Their enemies are the people that treat them as country bumpkins and the prefecture of Ibaraki.
There is a Japanese meme revolving around the Gunmaa Empire (which may or may not be related to the real Gunma prefecture in the Kantou region), which is a fictional unexplored region within Japan. The rabbit hole goes surprisingly deep.
All of this image (save for the info on the actual Gunma's Prefectural Citizen's Day) is about that meme.