September 14

The first Battle of the Masurian Lakes ends in a German victory. The Germans push the Russian First Army back, ejecting it from German soil. Further progress was hampered by the arrival of the Russian Tenth Army on the Germans' left flank. Despite its numerical superiority and heavily fortified defensive position, the Russians suffer defeat and are forced to retreat in disarray. Russian  losses are great, and Russian plans on the Eastern Front are left in disarray.

The Eastern Front, September 1914

In the Battle of the Aisne, a stalemate ensues. Sir John French orders the BEF to begin digging defensive positions - the beginning of trench warfare on the Western Front.

At 4am, 116 of the 26th Brigade RFA is with the 1st Brigade forming an advanced guard. 117 and 118 marches to Tour de Paissy. At 8am 117 and 118 are in action at Arbre de Paissy.At 10.30am 118 advances to a position south of Chemin des Dames.

The British armed merchant cruiser RMS Carmania sinks the German auxiliary cruiser SMS Cap Trafalgar off the Trinidade and Martim Vaz archipeligo. The action is otherwise known as the Battle of Trinidade.

The Battle of Trinidade

The Australian submarine AE1 disappears while patrolling the St George's Strait between New Britain and New Ireland. It is the first vessel of the Royal Australian Navy to be lost in the war.