I don't know much about the history of breaking Enigma but this appears to be well documented and should be a worthy milestone. A comment: There is no indication of WHERE this activity took place. The first sentence of the citation seems a bit terse. Could it start with, "Near this site..." or "At such-and-such location..."? I think it would be more meaningful to the reader.
I agree with Lyle and believe that this achievement is worthy of being an IEEE Milestone.
It helped speed the end of WWII. Not sure that it ended WWII with American assistance.
I agree in general that this is worthy recognition as an IEEE milestone. What could be emphasized more is how this event is related to IEEE and it's predecessors.
I agree with Feisel's comments that the wording is a bit terse, or even awkward, and there is no location. The documentation is reasonable and the sources are the basic ones that I am familiar with regarding the history of codes and the enigma. The basic claim is valid. However, the last sentence is a bit vague...was the American support to win the war (true), or was it to work on enigma coding issues (not so true)? I support the concept of this milestone, but it is not ready for a final vote. Additional editing is needed. --Dave Bart