Germany and its approaches with international boundaries as of September 1, 1939, the day Germany invaded Poland and, in red, boundaries as of January 1, 1938, before Germany seized Austria and Czechoslovakia.
Notes: Relief shown by shading and spot heights. Overprinted in red: Occupational zone boundaries [and] U.S. occupational zone boundary. First Edition. For Official Use only of the British War Office. Refer to this map as B.A.O.R. 17. Reproduced by 14 Field Survey Coy R.E. 1946