Ernst Haeckel (general)

Ernst Haeckel, a.k.a. Häckel (5 April 1890 in Gemünden am Main – 26 September 1967) was a German general who was awarded the Knights Cross of the Iron Cross.

After the end of the war he contributed to military studies of the war for the American military, which are available at NARA:
 * The Campaign in the Rhineland 15.9 - beginning Dec 44.
 * 16th Infantry Division (June – September 13, 1944).