Hitler and Keitel at “Werwolf” headquarters near Vinnitsa, Ukraine, 1942

Per Wikipedia, Werwolf was the easternmost Headquarters used by Hitler in person. Hitler went there three times; his first stint, which lasted from July to October 1942, was the longest. The other two times were both less than a month.

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In the picture below are Martin Bormann, Adolf Hitler, Erich Koch, and Julius Schaub at Wehrwolf. Erich Koch – Wikipedia was the Reichskommissar in Reichskommissariat Ukraine from September 1941 until August 1944.

Ukraine as Major Aim and Battlefield of WW2, – Yale Prof. Timothy Snyder’s speech at German Bundestag >