The Trabzon Campaign of 1461, undertaken by Sultan Mehmed the Conqueror, was not limited solely to the elimination of the Trebizond Greek Empire. During this campaign, the Ottoman State also put an end to the Candaroğulları Principality in order to secure political unity along the Black Sea coast. Therefore, the only Turkish principality eliminated during the Trabzon Campaign was the Candaroğulları. This development represents a critical turning point for both the political unity of Anatolia and dominance over the Black Sea.

Before the conquest of Trabzon , the Ottoman Empire held a significant position in the western and central parts of the Black Sea. However, the Trebizond Empire continued to exist on the eastern Black Sea coast, and the Candaroğulları principality on the northwestern coast. This situation limited Ottoman maritime and trade policies. An examination of Trabzon's history clearly shows that the 1461 campaign was not merely a city siege, but a large-scale strategic purge. Sultan Mehmed the Conqueror first marched on Sinop, incorporated the Candaroğulları principality into Ottoman territory, and then turned his attention to Trabzon.

The Position of the Candaroğulları Principality in Black Sea Politics and its Relations with the Ottoman Empire

The Candaroğulları Principality was founded in the late 13th century, centered in Kastamonu, and later expanded its control to include Sinop, becoming a significant power on the Black Sea coast. The principality occupied a strategic location on Black Sea trade routes. Throughout the Middle Ages, the port of Sinop was considered one of the most important trading centers on the Black Sea.

The role of the Candaroğulları dynasty becomes even more significant in the historical context of Trabzon. This is because they maintained indirect contact with the Trebizond Greek Empire via the Black Sea trade route. For the Ottoman State, this situation posed a serious obstacle to complete dominance in the Black Sea. When Sultan Mehmed the Conqueror was planning the conquest of Trabzon, he had to secure the northern front. If the Candaroğulları had continued to exist, the security of the rear flank during the Ottoman army's campaign against Trabzon could have been jeopardized.

Although alliances and political marriages occasionally occurred between the Ottomans and the Candaroğulları, the independent structure of the principality was unacceptable to the Ottoman central authority. During the reign of Mehmed the Conqueror, the primary goal of Ottoman policy was to eliminate the fragmented structure in Anatolia and establish a unified administration. In this context, the Candaroğulları were one of the last significant Turkish principalities that needed to be eliminated.

Why did the strategic importance of Sinop and Kastamonu make the dissolution of the principality inevitable?

Sinop and Kastamonu, due to their geographical locations, are key points in the Black Sea defense and trade system. Sinop Port has a naturally sheltered harbor structure. This feature provides a great advantage for military naval forces. The Ottoman Empire aimed to make the Black Sea an inland sea. However, achieving this goal was not possible without securing complete control over Sinop.

Before the conquest of Trabzon, Sultan Mehmed the Conqueror's first step was to gain control of Sinop. Leaving an independent principality in the northern region during a military campaign against Trabzon was strategically risky. By capturing Sinop, the Ottoman navy gained a more secure area of operation in the Black Sea.

Kastamonu controlled the transit route between the Anatolian interior and the Black Sea. This region was vital for military supplies and logistics. The establishment of dominance by the Candaroğulları Principality in these two centers represented a potential point of resistance for the Ottomans. Therefore, the elimination of the principality was not only a political but also a military and economic necessity.

How did the Candaroğulları's contacts with the Akkoyunlu and the Trebizond Greek Empire worry the Ottomans?

The Ak Koyunlu state was a powerful actor in 15th-century Anatolian politics. Led by Uzun Hasan, the Ak Koyunlu posed a serious threat to the Ottoman Empire's eastern border. The fact that the Candaroğulları principality was in contact with this power was considered a risk factor for the Ottomans.

During the same period, the Trebizond Empire had also established political relations with the Ak Koyunlu. This raised the possibility of an anti-Ottoman bloc forming along the Black Sea coast. During his campaign against Trabzon, Sultan Mehmed the Conqueror aimed not only to destroy a city but also to dismantle this potential network of alliances.

As long as the Candaroğlu principality maintained its independent existence, the Akkoyunlu state could have gained indirect access to the Black Sea. This possibility could have weakened the Ottoman eastern policy. Therefore, the elimination of the principality was a preventive strategy for the Ottomans.

The Place of the Candaroğulları Dynasty in Mehmed the Conqueror's Policy of Completing Political Unity in Anatolia

One of the main goals of Sultan Mehmed the Conqueror was to establish political unity in Anatolia. The Ottoman Empire had largely eliminated the various principalities during the reign of Bayezid I, but a fragmented structure emerged again after the Battle of Ankara. During Mehmed's reign, the aim was to completely end this disunity.

The Candaroğulları Principality stood out as the last independent Turkish principality on the Black Sea coast. Its elimination, coinciding with the Trabzon Campaign, was a symbolic and strategic step towards the unification of Anatolia. This development strengthened the Ottoman Empire's centralized administrative approach.

With the principality's incorporation into the Ottoman Empire, the Black Sea coastline largely came under Ottoman control. This provided long-term stability, both economically and militarily.

Integration of the Candaroğulları Territories into Ottoman Administration After 1461 and Consolidation of Black Sea Dominance

With the capture of Sinop in 1461, the Candaroğulları Principality officially came to an end. The principality's territories were incorporated into the Ottoman administrative system, and the sancak (district) system was implemented. Local administrative structures were linked to the Ottoman center, and judges, sub-governors, and sancakbeys were appointed to the region. This integration process was carried out rapidly and systematically. The port of Sinop became one of the important bases of the Ottoman navy. Kastamonu, on the other hand, served as a military logistics center, acting as a connecting point between the Anatolian interior and the Black Sea.

With the conquest of Trabzon, both the eastern and western parts of the Black Sea came entirely under Ottoman control. Thus, the Black Sea effectively became an inland sea for the Ottomans. This increased trade security and reduced the influence of Genoa and other foreign naval powers.

In conclusion, during his Trabzon campaign, Sultan Mehmed the Conqueror put an end to the Candaroğulları Principality, thereby strengthening the political unity of Anatolia and securing complete dominance in the Black Sea. This development is considered a critical stage in the transformation of the Ottoman State from a regional power to a global empire.