EVER since the Berlin blockade of 1948–1949, the author has been asked on a number of occasions to explain how the zonal boundaries in Germany came to be drawn and why Berlin was left as an island in the Communist sea. A brief and simple answer was found to be impossible for several reasons: First, the Department of State does not have all the pertinent records, since the Department was not included in all of the negotiations on this subject. Second, some parts of the story do not seem to be documented adequately in any official records, with the result that certain aspects of the subject are open to controversial interpretations. Third, not only is the story of these negotiations complicated in itself, being woven from several separate strands, but it can only be explained in the larger framework of the overall planning for the occupation of Germany. Despite these many limitations and difficulties, the author has felt that he should attempt to set down as complete and objective an answer as he could to the persistent queries which this subject has evoked. The result is the present article.