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.
The key units moved into the city making it vulnerable
( z1 move :ARG1 ( z2 unit :ARG1-of ( z3 key ) ) :ARG2 ( z4 city ) :ARG0-of ( z5 make :ARG1 ( z6 vulnerable :ARG1 z4 ) ) )