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Balkans Theatre
Part of World War I
Date August 3, 1914-August, 1918 Location Serbia, Romania, Bulgaria Result Treaty of Versailles, Treaty of Brest-Litovsk, Treaty of Neuilly, Treaty of Trianon, Treaty of Bucharest
Combatants
German Empire  Austria-Hungary Bulgaria	Russian Empire  France  United Kingdom Serbia Romania Greece Montenegro
Commanders
Paul von Hindenburg Erich von Falkenhayn August von Mackensen Conrad von Hötzendorf Oskar Potiorek Nikola Zhekov Georgi Todorov Vladimir Vazov	Aleksei Brusilov Louis Franchet d'Esperey Maurice Sarrail Radomir Putnik Constantin Prezan Panagiotis Danglis Nicholas I

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The Balkans Campaign of World War I was fought between Central Powers: Bulgaria, Austria-Hungary and Germany on one side and the Allies: France, Russia, the United Kingdom, Serbia (and later Romania and Greece, who sided with the Allied Powers) on the other side.

Contents 1 Overview 2 Serbian Campaign 3 Romanian Campaign 4 Bulgarian Campaign 5 Macedonian front 6 Results

The prime cause of World War I being the hostility between Serbia and Austria-Hungary, it is hardly surprising that some of the earliest fighting took place between Serbia and its powerful neighbour to the north: Austria-Hungary. Serbia held out against Austria-Hungary for more than a year before it was conquered in late 1915.

Allied diplomacy was able to bring Romania into the war in 1916 but this proved disastrous for the Romanians. Shortly after they joined the war, a combined German, Austrian, Bulgarian and Ottoman offensive conquered two-thirds of their country in a rapid campaign which ended in December of 1916. However, the Romanian and Russian armies managed to stabilize the front and hold on to Moldavia.

In 1917, Greece entered the war on the Allied side, and in 1918, the multi-national Army of the Orient, based in northern Greece, finally launched an offensive which drove Bulgaria to seek peace, recaptured Serbia and finally halted only at the border of Hungary in November 1918.

Main article: Serbian Campaign (World War I)

The Serbian Army was able to fight off the larger army of Austria-Hungary thanks, in large part, to the fact that the Austrians had to focus their attention on fighting off the huge Russian Army. In 1915 the Austrians gained military support from Germany and, with diplomacy, brought in Bulgaria as an ally. Serbian forces were attacked from both the north and the east and were forced to retreat. The retreat was skillfully carried out and the Serbian Army remained operational, even though it was now based in Greece.

Main article: Romanian Campaign (World War I)

Romania before the war was an ally of Austria-Hungary but, like Italy, refused to join the war when it started. The Romanian government finally chose to side with the Allies in August 1916, the main reason being Transylvania. The war started as a total disaster for Romania. Before the year was out, the Germans, Austrians, Bulgarians and Ottomans had conquered Wallachia and Dobruja – and captured more than half of its army as POWs^{[citation needed]}.

In 1917, re-trained (mainly by a French expeditionary corps under the command of General Henri Berthelot) and re-supplied, the Romanian Army, together with a desintegrating Russian Army, were successful in containing the German advance into Moldavia.

In May 1918, after the German advance in Ukraine and Russia signing the Treaty of Brest-Litovsk, Romania, surrounded by the Central Powers forces, had no other choice but to sue for peace (see Treaty of Bucharest, 1918).

After the successful offensive on the Thessaloniki front which knocked Bulgaria out of the war, Romania re-entered the war on November 10, 1918.

In the aftermath of the Balkan Wars Bulgarian opinion turned against Russia and the western powers, whom the Bulgarians felt had done nothing to help them. The government aligned Bulgaria with Germany and Austria-Hungary, even though this meant also becoming an ally of the Ottomans, Bulgaria's traditional enemy. But Bulgaria now had no claims against the Ottomans, whereas Serbia, Greece and Romania (allies of Britain and France) were all in possession of lands perceived as Bulgarian. Bulgaria, recuperating from the Balkan Wars, sat out the first year of World War I, but when Germany promised to restore the boundaries of the Treaty of San Stefano, Bulgaria, which had the largest army in the Balkans, declared war on Serbia in October 1915. Britain, France and Italy then declared war on Bulgaria.

Although Bulgaria, in alliance with Germany, Austria-Hungary and the Ottomans, won military victories against Serbia and Romania, occupying much of Macedonia (taking Skopje in October), advancing into Greek Macedonia, and taking Dobruja from the Romanians in September 1916, the war soon became unpopular with the majority of Bulgarian people, who suffered enormous economic hardship. The Russian Revolution of February 1917 had a great effect in Bulgaria, spreading antiwar and anti-monarchist sentiment among the troops and in the cities.

In September 1918 the Serbs, British, French, Italian, Rusian, and Greeks achieve penetration on the Macedonian front, triggering revolts in the troops. Tsar Ferdinand was forced to sue for peace. In order to head off the revolutionaries, he persuaded Ferdinand to abdicate in favour of his son Boris III. The revolutionaries were suppressed and the army disbanded. Under the Treaty of Neuilly (November 1919), Bulgaria lost its Aegean coastline to Greece and nearly all of its Macedonian territory to the new state of Yugoslavia, and had to give Dobruja back to the Romanians (see also Dobruja, Western Outlands, Western Thrace).

Main article: Macedonian front (World War I)

In 1915 the Austrians gained military support from Germany and, with diplomacy, brought in Bulgaria as an ally. Serbian forces were attacked from both north and south and were forced to retreat. The retreat was skillfully carried out and the Serbian army remained operational, even though it was now based in Greece. The front stabilised roughly around the Greek border, through the intervention of a Franco-British-Italian force which had landed in Salonica. The German generals had not let the Bulgarian army advance towards Salonika, because they hoped they could persuade the Greeks to join the Central powers. Three years later (1918) this mistake was already irreparable.

In 1918, after a prolonged build-up, the Allies, under the energetic French General Franchet d'Esperey leading a combined French, Serbian, Greek and British army, attacked out of Greece. His initial victories convinced the Bulgarian government to sue for peace. He then attacked north and defeated the German and Austrian forces that tried to halt his offensive. By October 1918 his army had recaptured all of Serbia and was preparing to invade Hungary proper. The offensive halted only because the Hungarian leadership offered to surrender in November 1918.

The neutrality of this article is disputed. Please see the discussion on the talk page.(December 2007) Please do not remove this message until the dispute is resolved.

While the Allies hoped that the addition of Greece and Romania to their side would increase their strength against the Central Powers, in actual fact, both the Greeks and the Romanians cost the Allies extra, in terms of men and materials that had to be supplied in order to save them from destruction by the German, Austria, and Bulgarian armies.

The Russians had to pour extra divisions and supplies to keep the Romanian army from being utterly destroyed. According to John Keegan, the Russian Chief of Staff, General Alekseev was very dismissive of the Romanian army and argued that they would drain, rather than add to the Russian reserves (John Keegan, World War I, pg 307). Alekseev was proved correct in his analysis.

The French and British kept six divisions each on the Greek frontier from 1916 till the end of 1918. Originally, the French and British went to Greece to help Serbia, but with Serbia's conquest in the fall of 1915, their continued presence was pointless. For nearly three years, these divisions accomplished essentially nothing and only tied down half of the Bulgarian army, which wasn't going to go far from Bulgaria in any event.

In fact, Keegan argues that "the installation of a violently nationalist and anti-Turkish government in Athens, led to Greek mobilization in the cause of the "Great Idea" - the recovery of the Greek empire in the east - which would complicate the Allied effort to resettle the peace of Europe for years after the war ended." (Keegan pg. 308).

v • d • e World War I
General	Main events	Specific articles	Participants	See also
Prelude: Causes Sarajevo assassination July Ultimatum Theatres: Western Front Eastern Front Italian Front Middle Eastern Theatre Balkan Theatre Atlantic Theatre African Theatre Pacific Theatre General timeline: WW I timeline See also: Female roles Literature Total war Veterans	1914: Battle of Liège Battle of Tannenberg Invasion of Serbia First Battle of the Marne First Battle of Arras Battle of Sarikamis 1915: Mesopotamian Campaign Battle of Gallipoli Italian Campaign Conquest of Serbia 1916: Battle of Verdun Battle of the Somme Battle of Jutland Brusilov Offensive Conquest of Romania Great Arab Revolt 1917: Second Battle of Arras (Vimy Ridge) Battle of Passchendaele Capture of Baghdad Conquest of Palestine 1918: Spring Offensive Hundred Days Offensive Meuse-Argonne Offensive Armistice with Germany Armistice with Ottoman Empire	Military engagements Naval warfare Air warfare Cryptography People Poison gas Railways Technology Trench warfare Civilian impact and atrocities: Armenian Genocide Assyrian Genocide Pontic Greek Genocide Aftermath: Aftermath Casualties League of Nations Paris Peace Conference Partitioning of the Ottoman Empire Spanish flu Treaty of Brest-Litovsk Treaty of Lausanne Treaty of Neuilly Treaty of St. Germain Treaty of Sèvres Treaty of Trianon Treaty of Versailles	Entente Powers Russian Empire French Empire   » France   » Vietnam British Empire   » United Kingdom   » Australia   » Canada   » India   » New Zealand   » Newfoundland   » South Africa Italy Romania United States Serbia Portugal Republic of China Japan Belgium Montenegro Greece Armenia more… Central Powers German Empire Austria-Hungary Ottoman Empire Bulgaria	Contemporaneous conflicts: Mexican Revolution (1910-20) First Balkan War (1912-13) Second Balkan War (1913) Maritz Rebellion (1914-15) Easter Rising (1916) Russian Revolution (1917) Russian Civil War (1917-21) Finnish Civil War (1918) North Russia Campaign (1918-19) Wielkopolska Uprising (1918-19) Estonian War of Independence (1918-1920) Latvian War of Independence (1918-1920) Polish-Soviet War (1919-21) Polish-Lithuanian War (1920) Irish War of Independence also known as the Anglo-Irish War (1919-21) Turkish War of Independence including the Greco-Turkish War (1919-23) Irish Civil War (1922-23) More information on World War I: World War I from Wiktionary WWI Textbooks from Wikibooks WWI Quotations from Wikiquote WWI Source texts from Wikisource WWI Images & media from Commons WWI News stories from Wikinews