The Russian Sixth Army was a World War I Russian field army that fought on the Eastern theatre of war.
The 6th Army Field Headquarters was established in July 1914 at the Saint Petersburg Military District.
Between July 1914 and December 1916, the Army was tasked with defending St. Petersburg and the Baltic and White Seas' coasts.
In August 1915, it became part of the newly formed Northern Front.
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