 Complete the following phrase:  On 27 May, the IAF lost a MiG-21 to enemy action and a MiG-27 to mechanical failure. The following day, a Mi-17 was lost to SAMs while on an offensive sortie. These losses forced the IAF to withdraw helicopters from offensive roles. On 30 May, the IAF called into operation the Mirage 2000 which was deemed the best aircraft in the high-altitude conditions. Mirage 2000s not only had better defence equipment compared to the MiGs, but also gave IAF the ability to carry out aerial raids at night. Indian MiG-29s were used extensively during the 1999 Kargil War in Kashmir by the Indian Air Force to provide fighter escort for Mirage 2000s, which were attacking targets with laser-guided bombs. Kargil War finally came to end with a Decisive 