security guard, watchman, watcher - a guard who keeps watch

detachment - a small unit of troops of special composition

protester, demonstrator - someone who participates in a public display of group feeling

military vehicle - vehicle used by the armed forces

picket boat - a boat serving as a picket

picket ship - a ship serving as a picket

armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"

paling, picket fence - a fence made of upright pickets

strip - thin piece of wood or metal

demonstrate, march - march in protest; take part in a demonstration; "Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle"

fasten, fix, secure - cause to be firmly attached; "fasten the lock onto the door"; "she fixed her gaze on the man"