Alexander I of Russia vs Ferdinand I of Bulgaria

Alexander I ascended the throne after the assassination of his father, Paul I. He was aware of the conspiracy but did not prevent it. His accession was greeted with relief by the nobility, who hoped for a return to the liberal policies of Catherine the Great.

Alexander I led Russia during Napoleon's invasion. The Russian army retreated, employing scorched-earth tactics, and then defeated the French at the Battle of Borodino. Napoleon's Grand Army was destroyed during the winter retreat from Moscow. This victory made Alexander a key figure in European politics.

Alexander I played a leading role at the Congress of Vienna, which redrew the map of Europe after Napoleon's defeat. He advocated for the creation of the Holy Alliance and secured Russian control over Poland as a constitutional kingdom. The congress established a balance of power that lasted for decades.

Alexander I initiated the Holy Alliance with Austria and Prussia, a pact based on Christian principles to maintain peace and suppress revolutions. The alliance became a tool for reactionary policies across Europe, intervening in uprisings in Italy and Spain. It reflected Alexander's growing mysticism and conservatism.

Alexander I granted a liberal constitution to the Kingdom of Poland, which he created as a personal union with Russia. The constitution established a parliament, civil liberties, and a separate army. However, Alexander later violated its provisions, leading to Polish discontent and eventual uprisings.

Alexander I died suddenly in Taganrog under unclear circumstances, leading to rumors that he had faked his death to become a hermit. The legend of Feodor Kuzmich, a holy man who appeared in Siberia and was believed to be Alexander, persisted for decades. His death triggered the Decembrist Revolt.

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.