The mosque ruins you encounter while traveling through the Balkans, abandoned Turkish neighborhoods, or towns once densely populated by Muslims but today bearing different names, are silent witnesses to a history that most travelers do not notice. During the period spanning the 19th century into the early 20th, in the era of Ottoman decline and collapse, millions of Muslims either lost their lives or were forced to migrate from the lands where they were born. This is a genuine and human tragedy that has often failed to find its rightful place in historical writing. In this article, we attempt to address the subject in a straightforward, sourced, and balanced manner.

What We Know: Established Historical Facts

The core truth on which historians broadly agree is this: during approximately a century when the Ottoman Empire lost its European territories, Muslim civilians faced large-scale death, mass slaughter, epidemic disease, famine, and forced migration. This process was not a single event but deepened through successive wars:

  • The 1821 Greek Uprising and After: A significant portion of the Muslim communities in the Peloponnese were killed or abandoned the region.
  • The 1877-78 Ottoman-Russian War ('War of 1878'): Approximately 750,000 people migrated from Bulgaria; an estimated quarter of these migrants died on the road from cold, hunger, and disease.
  • Caucasian Exiles: As Russia conquered the North Caucasus, Circassians and other Muslim peoples were driven to the Black Sea coast; 1-1.5 million people were displaced, with heavy losses during this migration.
  • The 1912-13 Balkan Wars: These wars, which brought the Ottoman presence in Europe to an almost complete end, were among the most devastating periods for Muslim civilian populations.

What Do the Numbers Tell?

One of the most comprehensive studies in this field is American historian Justin McCarthy's 1995 book, Death and Exile: The Ethnic Cleansing of Ottoman Muslims, 1821-1922. According to McCarthy's estimates, between 1821 and 1922, approximately 5.5 million Muslims died and approximately 5 million people became refugees. McCarthy argues that roughly one-fifth of modern Turkey's population descends from refugees from this period. Other researchers offer similar figures; for instance, historian Karl Kaser speaks of approximately 5 million deaths and a similar number of displaced people.

For the 1912-13 Balkan Wars alone, estimates suggest approximately 1.5 million Muslims died or were forced into exile. According to some studies, approximately 27 percent of the Muslim population in conquered territories lost their lives in these wars; by 1923, only about one-third of the 1912 Balkan Muslim population remained in the region. An independent source documenting Ottoman brutality against Muslim civilians in Macedonia is the 1913 Carnegie Commission Report.

What Is Contested: The "7 Million" and "Genocide" Label

Here we must be forthright. The phrase frequently shared on social media, "7 million Turks were subjected to genocide between 1810 and 1920," while presented as a factual certainty, is contested. First, there is the matter of numbers: most historians, including McCarthy, place death tolls at roughly 5-5.5 million; "7 million" exceeds this and cannot be presented as a single confirmed fact. Second, there is a matter of terminology. In academic literature, terms such as ethnic cleansing, forced migration, mass death, and massacre are commonly used for these events. While some authors employ the term "genocide," whether this term is appropriate in this context remains a debated question among historians. Some researchers (such as Mark Levene) caution that fitting these events into a single framework oversimplifies a complex reality.

Also, the frequently repeated claim that "before the Balkan Wars, the region's population was more than half Muslim" is accurate for some areas but has not been verified as a comprehensive fact for all the Balkans; therefore, it should be viewed not as certain data but as a carefully considered estimate.

Source Honesty: Why Is McCarthy a Contested Figure?

An honest reading of this subject requires examining the source itself. While Justin McCarthy is a historian who has conducted serious archival work on Ottoman demographics, he is a contested figure. In particular, his views regarding the Armenian question have drawn heavy criticism from many academics, and his work has been characterized by some colleagues as "defensively pro-Turkish." Therefore, his figures should be presented not as settled and indisputable truths but as estimates to be read alongside other research in the field. This article aims to do precisely that: neither to fall into nationalist propaganda nor to ignore the pain that was endured.

Why Is It Discussed So Little?

The experience of migration and loss endured by Ottoman Muslims is counted among the largest population movements in European history since the Thirty Years' War; yet it finds relatively little space in general historical narratives. There are several reasons: because the events were not the work of a single state or a single agent, their narrative is fragmented; the victims were Muslims of various ethnic identities (Turkish, Albanian, Bosnian, Pomak, Circassian, Tatar); and significant portions of the records remain in the archives of a collapsed empire. Nevertheless, academic interest has grown in recent years, and serious studies on the subject have been published.

From a Traveler's Perspective

Today, when traveling through places such as Salonica, Skopje, Philippopolis, Sofia, or Crete, the place names you encounter, architectural traces, and emptied neighborhoods are silent documents of this history. Noticing these traces is not for the sake of exalting one side and demonizing another; it is to understand the painful past of a shared geography with human compassion. The multilayered identity of the Balkans gains much richer meaning when read together with the fact that Muslims lived here for centuries and then largely vanished. History is the story not of winners, but of all who lived there.

This subject remains a sensitive area in historical writing. Numbers and terminology vary according to sources; this article privileges established facts while clearly attributing contested claims.

Sources