Ukrainian President Petro Poroshenko claims Ukraine will stop the aggressor in case of a further offensive.
"If the aggressor resorts to active offensive operations, Ukraine will be able to stop the enemy," he said during a conference after military exercises, which involved the military chiefs and Armed Forces personnel.
At the same time, he pointed out that Russia had been provoking and initiating global destabilization.
"The global destabilization, which has been initiated and is inspired by the Russian Federation, the bombing of Syria, and non-cooperation in the investigation into a terrorist attack on the MH17 aircraft makes us move to a completely different level of response," he added.