Soldier
Sailor
noun
A soldier in a squad is a real soldier or sailor, unlike those "soldier" who are not in a squad. They don't have jobs, and can't be called real soldiers.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
これは兵隊アリですね。
This is a soldier ant.
兵隊達は、気の向くままに森を歩いていた。
The soldiers wandered the woods aimlessly.
うちの息子達は、最近兵隊ごっこをすることにハマっています。
Our sons have recently become really into playing soldiers.