Map of the Eastern Front in the summer of 1915 as the German-Austro-Hungarian Gorlice-Tarnow Offensive continued to advance against the retreating Russians. From 'The German General Staff and its Decisions, 1914-1916' by General von Falkenhayn.
Map 4.
Summer Campaign in the East, 1915
a—German-Austrian battle line, end of April, 1915.
b—German-Austrian battle line, end of May, 1915.
c—German-Austrian battle line, June 20, 1915.
d—German-Austrian battle line, July 11, 1915.
e—German-Austrian battle line, September 9, 1915.
f—German-Austrian battle line, beginning November, 1915.
Operations in Courland
g—German battle line, end of May, 1915.
h—German-Austrian attacks, beginning of May, 1915.
i—German-Austrian attacks, middle of July, 1915.
j—Attacks on September 9, 1915.
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