A challenge to the conventional Western Front bias of World War I history, a must-have for any war historian Unlike the stalemate of the trenches in Flanders, the little-known eastern front of World War I was a war of movement that caused 12 million casualties, including female combatants. It spanned thousands of miles, from the Baltic to the Black and Caspian seas, before spreading north to the Arctic and east to the Pacific, embroiling several thousand British Empire and U.S. soldiers in secret operations in the far North, Siberia, and Ukraine. After the war, Britain and France rebuilt themselves and the U.S. was unaffected. In the east, this savage conflict of atrocities destroyed all the belligerents: the German, Austro-Hungarian, Ottoman, and Russian empires.