Why was the enigma so important?

The Enigma code was important to the Germans to transmit information to their officers across Europe. If Alan Turing hadn't deciphered the code using his own machine, the Bombe, the Allies might not have won the war.

http://en.m.wikipedia.org/wiki/Western_Front_(World_War_II)#/image/File:Ww2_allied_advance_siegfried_line.jpg

http://en.m.wikipedia.org/wiki/North_African_Campaign#/image/File:American_troops_on_board_a_landing_craft_heading_for_the_beaches_at_Oran_in_Algeria_during_Operation_%27Torch%27,_November_1942._A12661.jpg