On the eve of a widely anticipated retaliation against Russian forces in Grozny, military commanders withdrew key units from the city, leaving it vulnerable to guerrilla infiltration.
Guerrillas infiltrated Grozny after military commanders withdrew key units from the city.
We don't know if they infiltrated it or not just that it was now vulnerable to it.
( z1 infiltrate :ARG0 ( z2 guerrilla ) :ARG1 ( z3 city :name ( z4 name :op "Grozny" ) ) :time ( z5 after :op ( z6 withdraw :ARG0 ( z7 person :ARG0-of ( z8 have-org-role :ARG1 ( z9 military ) :ARG2 ( z10 commander ) ) ) :ARG1 ( z11 unit :ARG1-of ( z12 key ) ) :ARG2 z3 ) ) )