Head of the Russian General Staff’s Main Department Igor Korobov said that terrorists use the so-called "bee swarm" tactics, carrying out chaotic shelling attacks and surprise assaults on the Syrian government units, Russia Today reported on Friday. 
During his participation in the Army-2017 international forum, Korobov said that terrorists use the so-called "bee swarm" tactics, carrying out chaotic shelling assaults and surprise attacks on Syrian government units, which involve small but well-trained groups. 
He added that terrorists are capable of quickly changing tactics, shifting from guerrilla assaults to frontal attacks and vice versa. 
He also said that using this tactic militants create an effect of a continuous attack to push their adversaries' confidence down and reduce morale even from rather large military units.

Source: Mena