World War I, or the First World War , was a global military conflict which involved the Great powers, organized into two opposing military alliances: the Allies of World War I and the Central Powers.... , there was:
conflict = First Battle of the Masurian Lakes|partof = the Eastern Front during World War I|image = |caption = Eastern Front to September 26, 1914.... , September 1914
The Second Battle of the Masurian Lakes, also known as the Winter Battle of the Masurian Lakes, was the northern part of the Central Powers' offensive on the Eastern Front in the winter of 1915.... , February 1915
