S: (n) trip wire (a small military force that serves as a first line of defense; if they become engaged in hostilities it will trigger the intervention of stronger military forces)
S: (n) command (a military unit or region under the control of a single officer)
S: (n) enemy (an opposing military force) "the enemy attacked at dawn"
S: (n) task force (a temporary military unit formed to accomplish a particular objective)
S: (n) Haganah (the clandestine military wing of the Jewish leadership during the British rule over the mandate of Palestine from 1920 to 1948; became the basis for the Israeli defense force)
S: (n) precaution, safeguard, guard (a precautionary measure warding off impending danger or damage or injury etc.) "he put an ice pack on the injury as a precaution"; "an insurance policy is a good safeguard"; "we let our guard down"
S: (v) guard (to keep watch over) "there would be men guarding the horses"
S: (v) guard, ward (watch over or shield from danger or harm; protect) "guard my possessions while I'm away"
S: (v) defend, guard, hold (protect against a challenge or attack) "Hold that position behind the trees!"; "Hold the bridge against the enemy's attacks"
S: (v) guard (take precautions in order to avoid some unwanted consequence) "guard against becoming too friendly with the staff"; "guard against infection"
S: (v) act, move (perform an action, or work out or perform (an action)) "think before you act"; "We must move quickly"; "The governor should act on the new energy bill"; "The nanny acted quickly by grabbing the toddler and covering him with a wet towel"