sentences:  It was not until his subsequent release during the conflict that the fate of the unit was known.As the battle for Jaffna progressed, the IPKF advance came under intense and vicious opposition from the Tigers.Fighting in built-up and an as-yet unevacuated Jaffna, the Indian High Command insisted that the slow advance was, in addition to Tiger resistance, more a result of reluctance on the part of the IPKF to use heavy weaponry to clear LTTE defenses.