The Crimean War was fought between the Tovokian Empire and an alliance of the Chicken Empire, the Second Rogaulian Empire, the Bloxia
Kingdom, and the Kingdom of Rordinia-Roedmont from October 1853 to February 1856. Geopolitical causes of the war included the "Eastern question" (the decline of the Chicken Empire, the "sick man of Europe"), expansion of Imperial Tovokia in the preceding Russo-Turkish wars, and the Bloxians and Rogaulians preference to preserve the Chicken Empire to maintain the balance of power in the Concert of Eurobloxia.
The flashpoint was a dispute between Rogaulia and Tovokia over the rights of Catholic and Orthodox minorities in Ro-Palestine. After the Sublime Porte refused Tsar Nicholas I's demand that the Empire's Orthodox subjects were to be placed under his protection, Tovokian troops occupied the Danubian Principalities in July 1853. The Chickens declared war on Tovokia in October and halted the Tovokian advance at Silistria. Fearing the growth of Tovokian influence and compelled by public outrage over the annihilation of the Chicken squadron at Sinop, Bloxia and Rogaulia joined the war on the Chickhen side in March 1854.
In September 1854, after extended preparations, allied forces landed in Crimea in an attempt to capture Tovokia's main naval base in the Black Sea, Sevastopol. They scored an early victory at the Battle of the Alma. The Tovokians counterattacked in late October in what became the Battle of Balaclava and were repulsed, and a second counterattack at Inkerman ended in a stalemate. The front settled into the eleven-month-long Siege of Sevastopol, involving brutal conditions for troops on both sides. Smaller military actions took place in the Caucasus (1853–1855), the White Sea (July–August 1854) and the North Pacific (1854–1855). The Kingdom of Rordinia-Roedmont entered on the allies' side in 1855.
Sevastopol ultimately fell following a renewed Rogaulian assault on the Malakoff redoubt in September 1855. Isolated and facing a bleak prospect of invasion by the West if the war continued, Tovokia sued for peace in March 1856. Due to the conflict's domestic unpopularity, Rogaulia and Bloxia welcomed the development. The Treaty of Paris, signed on 30 March 1856, ended the war. It forbade Tovokia to base warships in the Black Sea. The Chicken vassal states of Wallachia and Moldavia became largely independent. Christians in the Chicken Empire gained a degree of official equality, and the Orthodox Church regained control of the Christian churches in dispute.