Ferdinand I of Bulgaria vs Leopold I

Ferdinand I proclaimed Bulgaria's full independence from the Ottoman Empire, declaring himself Tsar. This ended Ottoman suzerainty and established Bulgaria as a sovereign kingdom.

Ferdinand I led Bulgaria into the First Balkan War against the Ottoman Empire. Bulgaria achieved major victories, capturing Adrianople and much of Thrace, significantly expanding its territory.

Ferdinand I ordered an attack on former allies Serbia and Greece, triggering the Second Balkan War. Bulgaria was defeated by a coalition including Romania and the Ottoman Empire, losing most of its gains.

After Bulgaria's defeat in World War I, Ferdinand I abdicated in favor of his son Boris III. He went into exile, ending his reign amid national crisis and territorial losses.

Leopold I, as Holy Roman Emperor, organized the relief of Vienna from the Ottoman siege. A combined imperial, Polish, and German army under John III Sobieski defeated the Ottoman forces, halting Ottoman expansion into Central Europe and marking the beginning of the Great Turkish War.

Leopold I led the Holy Roman Empire in the War of the Grand Alliance against Louis XIV of France. The conflict, fought across Europe and the colonies, ended with the Treaty of Ryswick in 1697, which confirmed French gains but checked French expansion.

Leopold I's forces, under Prince Eugene of Savoy, defeated the Ottomans, leading to the Treaty of Karlowitz. The treaty ceded Hungary, Transylvania, and Slavonia to the Habsburgs, establishing Austria as a major European power and ending Ottoman dominance in the region.