What Happened to Balkan Wars?

The Balkan Wars were two pivotal military conflicts that occurred in Southeast Europe between 1912 and 1913, marking a dramatic shift in the region's geopolitical landscape. The First Balkan War, from October 1912 to May 1913, saw a coalition of Balkan states—Serbia, Bulgaria, Greece, and Montenegro, forming the Balkan League—declare war on the Ottoman Empire. Driven by a desire for autonomy, independence, and territorial expansion, the League swiftly defeated the Ottomans, stripping them of nearly all their remaining European provinces, except for a small portion of Thrace and the city of Adrianople (Edirne).

The rapid success of the Balkan League, however, quickly led to internal disputes over the division of the newly acquired territories, particularly Macedonia. This dissatisfaction ignited the Second Balkan War in June 1913, where Bulgaria, feeling shortchanged, attacked its former allies Serbia and Greece. Romania and the Ottoman Empire subsequently joined the conflict against Bulgaria, leading to Bulgaria's decisive defeat. The Treaty of Bucharest in August 1913 formalized Bulgaria's losses and solidified new borders, but left deep-seated resentments and magnified nationalist sentiments across the region.

The consequences of the Balkan Wars were profound and far-reaching. They resulted in immense casualties, with an estimated 65,000 Bulgarian, 9,500 Greek, 3,000 Montenegrin, 36,000 Serbian, and 125,000 Ottoman soldiers killed, alongside tens of thousands of civilian deaths from disease and atrocities. The wars also alienated Bulgaria from Russia, its traditional patron, and significantly weakened the Ottoman Empire, accelerating its decline. Crucially, the heightened nationalist ambitions, particularly Serbia's expansionist aims which clashed with Austria-Hungary's interests, created a volatile environment that directly contributed to the outbreak of World War I in 1914, with many historians viewing the Balkan Wars as the beginning of the larger conflict.

As of September 26, 2026, the legacy of the Balkan Wars continues to manifest in the Western Balkans. The region remains a complex geopolitical flashpoint, characterized by persistent ethnic tensions and the ongoing efforts of several countries to integrate into the European Union. Relations between Serbia and Kosovo, which declared independence in 2008, remain strained, with normalization talks facilitated by the EU largely stalled. In June 2026, the Carnegie Endowment for International Peace noted that three years after the Ohrid Agreement, Kosovo and Serbia are far from normalization, with Serbia accused of violating commitments. Protests in Kosovo in September 2026 over war crimes verdicts further underscore the region's unresolved past.

Bosnia and Herzegovina continues to grapple with political institutions shaped by the 1990s conflict, with the leadership of Republika Srpska repeatedly challenging state legitimacy and threatening secession, countered by international interventions. General elections are scheduled for October 2026, testing the country's democratic maturity. Meanwhile, Montenegro and Albania are considered frontrunners in the EU accession process. Montenegro aims for EU membership by 2028, having provisionally closed 18 of 33 negotiating chapters by July 2026, though its progress was stalled in September 2026 by Croatia over wartime grievances. Albania received a positive Interim Benchmark Assessment Report in May 2026, entering the concluding phase of negotiations and provisionally closing three chapters by July 2026, with a goal to conclude negotiations by 2027. North Macedonia, despite starting accession talks in 2022, faces stalled progress due to internal political issues and historical disputes with Bulgaria. The region also experiences ongoing external influence from Russia and China, adding to the complexity of security and stability in the Balkans.