Infiltrate would be a soldier word. It means to work in between the enemy and pass through their lines.
The collective noun for soldiers that starts with S is squad.
Lacrosse is a sport that starts with L.
A landslide is a disaster that starts with L.
A group of soldiers can be called a troop.
Leukemia is something sad that starts with "l".
A plant that starts with the letter l is, lamium.
"Libya" and "Lebanon" start with "L".
Infantrymen
L-85/l-86
A 5 letter word that starts with an L is Lipid
linkin
A locomotive engineer starts with the letter l. A locomotive engineer works on a railroad.