Home Minister Rajnath Singh pays tribute, along with Chhattisgarh CMâu00c2u0080u00c2u0088Raman Singh, to the fallen jawans in Raipur yesterday. Pic/PTI

The Centre promised yesterday to review its strategy on battling Maoists, as the Chhattisgarh CMâu00c2u0080u00c2u0088warned that an operation would be launched "with more firmness" and "vigour" against the guerrillas in the coming days.