1943 began with continued tactical success for Dönitz in battle. In January Convoy TM 1 was nearly destroyed. The loss of 100,000 tons of fuel in one convoy represented the most devastating loss percentage of the war—only two of nine tankers reached port. The British 8th Army were forced to ration their fuel for a time, earning Dönitz the gratitude of the Afrika Korps. The Casablanca Conference, held that month, identified the Atlantic as the urgent priority. It was agreed that until the defeat of Dönitz and his men, there could be no amphibious landings in continental Europe. Unknown to Dönitz, Bletchley Park had restored the flow of Enigma information and the Admiralty was able to re-route convoys around wolfpacks. During January and February 1943 information was decrypted within 24 hours proving operationally useful, although this slipped at the end of the second month contributing to German interceptions. Even so, in appalling hunter weather, the Germans sank only 44 ships during the month, even with 100 U-boats at sea, the majority stationed in the mid-Atlantic air gap.