encirclement

piiritys, saarto, motitus The act of encircle encircling or the state of being encircled
puhekieltä The isolation of a target by the formation of a blockade around it
1990, (w), The Great Game, Folio Society 2010, p. 9:

Not only did it give the Russians an abiding fear of encirclement, whether by nomadic hordes or by nuclear-missile sites, but it also launched them on their relentless drive eastwards and southwards into Asia, and eventually collision with the British in India.