sentences:  Throughout the duration of Operation Pawan, the casualties suffered by the IPKF had been put at between 600  and 1,200.In addition to the LTTE's defensive operations alluded to above, the IPKF's problems were compounded by the fact that the Tigers, using classic guerrilla tactics, blended in with the local population.The IPKF also came face-to-face with child soldiers of the LTTE, something it had not expected.