A replacement for Operation Matador, named Operation Krohcol, was implemented on 8 December but the Indian troops were easily defeated by the Royal Thai Police and the Japanese 5th Division which had landed in Pattani Province, Thailand. Force Z of the Royal Navy (battleship , battlecruiser , and four destroyers, under the command of Admiral Tom Phillips) had arrived right before the outbreak of hostilities. Powerful Japanese air forces in Indochina achieved the Sinking of Prince of Wales and Repulse on 10 December, leaving the east coast of Malaya exposed, allowing the Japanese to continue their landings.