1) Action 2) Blockade 3) Military action 4) Military strategy 1) Beleaguering 2) Besieging 3) Blockade 4) Siege 
Encirclement is a military term for the situation when a force or target is isolated and surrounded by enemy forces. This situation is highly dangerous for the encircled force: at the strategic level, because it cannot receive supplies or reinforcements, and on the tactical level, because the units in the force can be subject to an attack from sev...