500-man battalion (Zhou dynasty Chinese army)
「旅」 has another reading with different meanings.
travel; trip; journey
周の軍制では旅は五百人で編成された。
In the Zhou military system, a battalion had 500 men.
詩人は羈旅の身で日本各地を回った。
I traveled to various places as a wanderer.
秋になり旅情を感じる良い季節になった。
It has become a season to feel travel sentiment.