Operation Rock Avalanche began in the early morning hours of 19 October 2007 when US and Afghan forces boarded UH-60 and CH-47 helicopters at the Korangal Outpost (KOP) to be inserted in the southern portion of the Korengal Valley, near the village of Yaka Chine.
The night of the 21st, US forces moved east to conduct operations near the villages of Landigal and Aliabad.