Category
page 1September 1915 in Europe
Zimmerwald Conference
1915 international socialist conference in Switzerland
Great Retreat
1915 strategic retreat by Russian forces during World War I
Battle of Loos
1915 offensive mounted on the Western Front during World War I
Second Battle of Champagne
1915 battle
Third Battle of Artois
1915 battle
Bulgarian–Ottoman convention
1915 treaty between Bulgaria and the Ottoman Empire
Mobilization of the Bulgarian Army in 1915