September 4th, 1915

- Just three days after the German ambassador in Washington delivered the Arabic Pledge to not attack passenger ships without warning, the German submarine U24, which had sunk Lusitania in May, torpedoes and sinks the British liner Hesperian off the coast of Ireland without warning.  Though Americans were aboard, none were among the thirty-two passengers who drown.  Nevertheless, the American government sees the sinking as flagrantly defying the Arabic Pledge, and demand further assurances that similar attacks will no longer occur.

The British liner Hesperian, torpedoed and sunk today by the German submarine U24 off Ireland.

- After two revisions, General d'Urbal of 10th Army submits today a plan to Foch that is acceptable to the commander of the Army Group of the North.  Along the thirty-two kilometre stretch of the line held by 10th Army will be deployed six corps, four of which are to make the primary attack north of Arras, and two a supporting attack south of the city.

- On the Eastern Front the German 8th Army captures the fortress of Grodno, between Vilna and Bialystok.  Further south, Austro-Hungarian forces have been battering against the Russian defensives along the Sereth River to no avail; in just four days of marching and combat, the Austro-Hungarian IV, XIX, and V Corps have suffered eight thousand casualties.  Moreover, supply problems bedevil the Austro-Hungarian formations, who report being short of ammunition and food.  Finally, dysentery and stomach flu claim numerous victims in the terrible conditions.

September 1st, 1915

- Kitchener issues orders today for the Indian Corps in France to remain part of the British Expeditionary Force through the next winter.  Though concerns have been expressed in some quarters regarding the ability of the Indian soldier to cope with the cold and miserable conditions of a Flemish winter, Kitchener understands that the Indian Corps have shown themselves capable of operating under such conditions just as well as the British divisions they fight alongside. There were also worries about the losses suffered by the Indian Corps since its arrival in France in October 1914 could be adequately replaced, but since the summer a steady stream of recruits had replenished the Meerut and Lahore Divisions.  Of the three thousand replacements who arrived in July, General James Willcocks, the commander of the Indian Corps, wrote that they were 'very good . . . some of them quite exceptionally so, and I feel years younger now as I see these fine fellows joining the ranks.'

- Upon the instructions of Chancellor Bethmann-Hollweg, the German ambassador to the United States delivers a note containing what becomes known as the Arabic Pledge to Secretary of State Robert Lansing.  Based on the decision of the conference at Pless on August 26th in response to the sinking of Arabic, the Germans pledge that no passenger ship of any nationality will be attacked without warning, and that adequate provisions will be made for the survival of passengers and crew.

- Joffre remains under pressure from government ministers to dispatch several divisions from the Western Front to the Near East, and seizes on a staff study suggesting that the operations proposed by General Sarrail would require eight divisions.  He writes today that such a substantial reduction in French strength on the Western Front would have 'disastrous consequences.'  Moreover, he questions the entire premise of undertaking operations to relieve the British position on Gallipoli:

It is the British who have led us to the Dardanelles.  In reality halting the offensive will be a British defeat.  Tomorrow, if we send reinforcements and assume command, we will find ourselves, in case of failure, facing a French disaster.

- For several days the Austro-Hungarian 2nd and 7th Armies, as well as Südarmee, have launched assault after assault on the Russian lines along the Strypa River.  Though in places they have managed to win some ground, it has come at great cost - the Austro-Hungarian Corps, for instance, has lost over five thousand men in just two days of fighting.  Today the Russian 11th and 9th Armies pull back from their lines along the Strypa River, though this is not due to any defeat they have suffered but rather due to the threat of envelopment from the north due to the advance of the north wing of the Austro-Hungarian 4th Army through Lutsk.  Brussilov's 8th Army, meanwhile, takes up its new defensive line today along the Putilowka, covering Rovno, and south to the hills west of Dubno.

August 26th, 1915

- Chancellor Bethmann-Hollweg convenes a conference at Pless today to discuss the diplomatic crisis that has ensued from the sinking of the passenger liner Arabic on the 19th.  He argues that there is no point arguing over whether the Americans ought to be outraged or not; the fact is they are, and that war is possible if decisive action is not taken.  His position that the Americans must be appeased by restricting submarine warfare is supported by Falkenhayn, who hopes that the United States can be kept out of the war.  Only the naval officers present insist that unrestricted submarine warfare must be allowed to continue, and that any concessions to the Americans would constitute pandering.  The navy is overruled, and Wilhelm II authorized Bethmann-Hollweg to conclude a diplomatic agreement with the Americans that defers to the latter's wishes regarding submarine warfare.  Admiral Bachmann, chief of the naval staff, asks to be relieved rather than execute a policy he disagrees with, and he is replaced by Admiral Hennig von Holtzendorff, a personal friend of the Chancellor and a skeptic of the ability of unrestricted submarine warfare to bring Britain to its knees.

- On the Eastern Front the German 12th Army finally manages to capture the Russian fortress of Osowiec today, which had repulsed prior assaults.  For several weeks it had served as a northern 'hinge' for the Russian retreat from Poland.  With the Russian armies to the south having pulled back behind the line of the fortress, Osowiec has served its purpose, and the Russians have withdrawn eastwards.

To the south, the fortress of Brest-Litovsk is also seized today; in the predawn hours advance elements of the German 11th Army pierce the inner fortifications and reach the Bug River, where they find the highway bridge in flames, set alight by the retreating Russians.  Despite their best efforts, however, vast quantities of food and supplies fall into German hands with the capture of Brest-Litovsk, including once again a significant stockpile of artillery shells that could have been put to much better use by the armies in the field.  The Russian forces on both flanks of the fortress also retreat, and 11th Army and the Army of the Bug make significant progress today, with the Guard, X Reserve, and XXII Reserve Corps reaching the line Rudka-Pruska northeast of Brest-Litovsk this evening.

German soldiers outside the burning citadel at Brest-Litovsk.

The Eastern Front after the fall of Brest-Litovsk, Aug. 26th, 1915.

- The second phase of Conrad's offensive opens today with the advance of the Austro-Hungarian 1st Army southeast from the line Kowel-Vladimir-Volynski.  Though the pace of the advance is slowed by the vast swamps of the region, which require foot-bridges to cross, the Austro-Hungarians are able to make encouraging progress against light opposition from Russian cavalry.  General Ivanov of Southwest Front, however, had not been ignorant of the potential threat to his northern flank with the withdrawal of 13th Army to the northeast, and had instructed General Brusilov of 8th Army to stretch his northern wing back from the Bug River to cover Lutsk, and the latter had deployed four cavalry divisions to screen his exposed flank.  The Russians have also used the two months of relative quiet along this stretch of the front to reinforce their battered divisions, and their average combat strength has risen from four to seven thousand.  The new recruits, however, are dreadfully inexperienced, and many lack rifles.

- British and French officials confer at Duala today regarding the campaign in German Kamerun, and decide on a joint thrust to Jaunde after the end of the rainy season (October in the east and November in the west).

August 21st, 1915

- The finance ministers of France and Britain, meeting at Boulogne today, agree to float a joint loan in the United States, though it will formally be in Britain's name only.  It was also agreed that proceeds would be shared with Russia, though Russian involvement would be kept private as American investors would be very hesitant to take up a loan backed by a government with such a poor fiscal reputation.  It is hoped that American revulsion at the sinking of the passenger liners Lusitania and, two days ago, Arabic would enhance the willingness of American investors to back the Entente financially, and President Wilson has indicated privately that while he will not endorse the loan, he will not oppose it.

- The Russians opposite Prince Leopold's army group retreat during the night, and during the former's pursuit of the latter today elements of both the German 12th Army and General Woyrsch's command cut the railway linking Brest-Litovsk and Bialystok while cavalry seize the town of Kleszczeli.

August 19th, 1915

- Recently-promoted Brigadier-General Hugh Trenchard is appointed today to command the Royal Flying Corps on the Western Front.  Having learned to fly in 1912 at the age of thirty-nine and served as second in command of the Central Flying School before the war, Trenchard was a protege of Kitchener, the two being similar in temperament, for better and worse.  With the RFC subordinate to the War Office, Kitchener appreciated Trenchard's opinion that the primary role of the RFC was to support the BEF.  It is an important milestone in the rise of Trenchard, who will become the most important figure in the wartime and postwar RFC.

- Lieutenant Oswald Boelcke gets his first kill today in his new Eindecker fighter.  He and Immelmann, both members of Abteilung 62 based at Douai, regularly fly together, and violate protocol by flying over enemy lines in search of enemy aircraft, instead of waiting for them to cross the front.

- For the past several months, a series of communications have traveled back and forth between Berlin and Washington, attempting to resolve the dispute over unrestricted submarine warfare which had emerged after the sinking of the passenger ship Lusitania in May, and the two sides are approaching agreement on the basis of Bethmann-Hollweg's declaration of June 1st that neutral ships, and passenger ships of all countries, are to be spared.  However, diplomatic discussions and theoretical limitations on the limits to submarine warfare take little account of the practical reality of naval combat in the North Atlantic, and the difficulty U-boat commanders can have reconciling such instructions with the necessity to ensure the safety of their submarine.  Off Kinsale, Ireland today the captain of U-20 encounters precisely this dilemma, and his choice torpedoes the diplomatic efforts since May.  The German U-boat stops the British steamer Durnsley, permitting the crew to enter their lifeboats before detonating bombs in the vessel's hold.  All of this is perfectly 'legitimate' submarine warfare, even in the eyes of the American, but it is what happens next that this problematic.  Durnsley takes a long time to sink, and as it does so the large passenger steamer Arabic of the White Star line appears, bound for New York.  The captain of U-20 recalls that his submarine had been fired upon by a large steamer five days earlier, and decides that Arabic is not just a target but a potential threat.  Rather than remain on the surface, possibly exposing itself to fire from the steamer, the captain orders U-20 to submerge and attack, firing a torpedo that strikes and sinks Arabic.  Forty-four passengers drown, including three Americans.  News of the sinking outrages American public opinion; not only does it make it seem that German submariners are ignoring instructions issued by their own government, but that the German government had been duping the Americans into believing they were making concessions regarding unrestricted submarine warfare that they either never intended to follow through on or could not be enforced.  Either way, the diplomatic progress of the past few months sinks with Arabic.

The British passenger steamer Arabic, torpedoed and sunk today by the German submarine U-20 off Kinsale, Ireland.

- For the past eleven days German artillery, directed by General Beseler, has been systematically reducing the fortifications around Novogeorgievsk.  Their work has been aided by the poor state of the defences - one fort was blown up by a single shell.  The siege ends today with the surrender of the surviving Russian garrison, and while the Russian armies in the field suffer from munition shortages, over a million shells fall unused into German hands, and the fall of Novogeorgievsk provides yet another example of how fortified positions, on their own, are no match for the power and range of modern artillery.

Russian artillery captured by the Germans after the fall of Novogeorgievsk.

German infantry occupying the Russian fortress of Novogeorgievsk after its capture.

- On the Eastern Front, Ludendorff issues orders for the German 10th Army to push its left wing from Kovno towards Vilna, with the Army of the Niemen covering ths northern flank of the advance by pushing towards the Dvina River.  On the southern flank 8th and 12th Armies are instructed to push to the northeast, and the former seizes the town of Bocki today.  Meanwhile, Prince Leopold's army group runs up against a new Russian defensive line running from Tokary to Nurec, and is held up.  Stiff resistance is also encountered west of Brest-Litovsk  by Russian forces on both sides of the Bug River as they attempt to cover the withdrawal of soldiers and wagons still in front of the fortress, and the German 11th Army is able to make only marginal gains today.  Upriver from Brest-Litovsk, however, the German 1st Division on the southern wing of the Army of the Bug is able to break through the Russian defenders along the Bug at Wlodawa and drive eastward to Piszcza by this evening.

The Austro-Hungarian offensive towards Kowel opens today with the advance of the cavalry corps commanded by the German General Ernst von Heydebreck and consisting of the German 5th and the Austro-Hungarian 4th and 11th Honved Cavalry Divisions.  The ground opposite is lightly defended, as the Russian 13th Army has been pulled northwards to maintain contact with 3rd Army and cover the lines of communication with Brest-Litovsk.  The only substantial Russian force in the area is XXXI Corps near Kowel, and it too is in the process of retreating northwards, its rear threatened by the advance of the Army of the Bug.  Otherwise, only cavalry rear guards remain to impede the German and Austro-Hungarian advance, and given the paucity of defenders the cavalry is able to cover significant ground.

- As General Cadorna assesses the failure of the first two offensives along the Isonzo River, his ire is drawn to Italian aviation and the director-general of the air corps, Colonel Maurizio Moris.  A myriad of difficulties has prevented the air corps from adequately supporting Cadorna's attacks: it is short of manpower, poorly organized, and the few Farman aircraft that are available are limited by a low ceiling.  The result has been poor observation of targets, preventing adequate counter-battery fire, and Cadorna writes to the war minister today insisting that the problems had to be fixed, and that Moris ought to go.  While the performance of the air corps has certainly failed to live up to expectations, the same could be said for the entire Italian war effort, and one cannot help but wonder the extent to which Cadorna is attempting to pass on blame that ought to rest on his shoulders.