In Prussia and Poland Germany is again on the attack first at the Vistula River, where poison gas makes its first appearance of the war and then in Prussia at the Second Battle of the Masuria Lakes. As winter turns into spring the Russians make one more attempt to break through the Carpathian mountain passes.

The History of the Great war is now available on Stitcher

Chemical make up of Xyxyl Bromide

Second Battle of Masurian Lakes