三さん等とう軍ぐん曹そう

Meanings

1

Historical rank in the Imperial Japanese Army, equivalent to sergeant. Not used in the modern Self-Defense Forces.

彼かれの祖そ父ふは戦せん時じ中ちゅう、三さん等とう軍ぐん曹そうとして従じゅう軍ぐんした。
His grandfather served as a sergeant during the war.