Addressing Army personnel on the occasion of Army Day, Gen Rawat also said that disputes along the Line of Actual Control with China were continuing and the Army was trying to stop the Chinese transgressions.
The Army chief said the Pakistan Army has been continuously trying to help terrorists sneak into India along Line of Control (LoC) in J&K.
The Army is using its might to "teach them a lesson", he said.
"Terrorists and their handlers are creating various challenges within the country by adopting new tactics.
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"Targeting of Amarnath pilgrims, attacking policemen and Army personnel from Jammu and Kashmir, including murder of Lt Ummer Fayaz, were attempts to attack national unity and divide the society," Rawat said.
He said the Army was working closely with other security forces to maintain pressure on terrorists.
Since the beginning of last year, the Army has pursued an aggressive anti-terror policy in Jammu and Kashmir and, at the same time, forcefully responded to all ceasefire violations by Pakistani troops along the Line of Control with a tit-for-tat approach.