He participated in military operations in Abkhazia and Samachablo (Tskhinvali region). Many military operations were planned and successfully conducted under the leadership of B. Grigolashvili. He was mortally wounded and died in the fighting in the Abkhazian war. Major general Boris Grigolashvili was posthumously awarded the order of Vakhtang Gorgasali I class (1993) for his outstanding contribution to the benefit of the Motherland and the nation, for his steadfastness and self-sacrifice, for his bravery and heroism in the fight to protect the Motherland and its territorial integrity, for his skilful leadership, implementation of defense measures, development and conduct of military operations.