|British dead lay before a captured German trench near Loos, Sept. 30th, 1915.|
|Ruined buildings in the village of Loos, Sept. 30th, 1915.|
- As a result of the debacle in Champagne that ensued after the false report of a breakthrough by the French 14th Division, Castlenau informs Joffre today that several days will be needed to reorganize and recover from the earlier fighting before the offensive can be resumed. Though a decision about timing has yet to be made, Joffre tells Castlenau to proceed as if another attack will be undertaken.
- As German and Austro-Hungarian forces finalize preparations for their invasion of Serbia, German aircraft have been conducting aerial reconnaissance of Serbian positions and key crossings of the Save and Danube Rivers. In addition, a series of bombing raids have been carried out, principally against Požarevac, the main Serbian airfield, and Kragujevać, home to munitions factories. By the end of September, the Germans have dropped approximately 2400 kilograms of bombs. At this stage of the war, however, aerial bombardment is still primitive, and it is estimated that half of the bombs fail to detonate. Only minimal resistance is faced by the German aircraft, though today Serbian air defenses score their only success of the campaign when they shoot down a German Albatross today, part of six-plane raid on Kragujevać.