The Battle began on the afternoon of May 31, 1916, scouting forces from the British and German navies began gunfire. When the main warships met, British Admiral John Jellicoe forced Germans ships to retreat by using the decreasing daylight to his advantage. This led to Britain getting in dozens of hits. The British had an great numerical advantage over the German, and was also able to break German codes. The second part of the battle began later that evening when the British Grand Fleet made a battle line at a 90 degree angle to cut the Germans off from their home base and were forced they were forced to retreat.