 Small clashes occurred on the nights of 15/16, 21/22, 22/23 and 23/24 July, suggesting that the PVA were preparing for a major attack.Aerial reconnaissance subsequently detected a build up of PVA forces and supplies west of the Samichon River.In response the Australians and Marines stepped up their defensive preparations, while at the same time rumours from the peace talks started to spread of a ceasefire.