On 8 December 1941, the Japanese occupied the Shanghai International Settlement. A couple of hours later, landings began at Kota Bharu in Malaya. An hour after that, the Imperial Japanese Navy attacked Pearl Harbor. On 10 December, "Prince of Wales" and "Repulse", sailing to meet the Malaya invasion force, were sunk by Japanese air attack. After the disastrous Malayan Campaign, Singapore surrendered on 15 February 1942. During the final stages of the campaign, the 15-inch and 9.2-inch guns had bombarded targets at Johor Bahru, RAF Tengah and Bukit Timah.