Which examples from "the enigma machine” are complex sentences? check all that apply. the importance of intercepting german communications became clear with the interception of the zimmermann telegram during world war i. for example, bletchley park was crucial in the battle of the atlantic, which lasted six years. the telegram was intercepted and deciphered by british intelligence, and it caused such outrage in the us that it generate public support for the united states’ entry into the war. the enigma machine was invented at the end of world war i by german engineer arthur scherbius. this was provided in a codebook, which was a monthly list of daily keys distributed to various networks in the german military. since the enigma machine could encrypt text into over 150 trillion possible combinations, germans were convinced the codes were not decipherable.