Britain declares war on Russia and joins France in sending troops to the Crimean Peninsula in the Black Sea. (By Brian Bockelman)

Crimean War begins in earnest, as France declares war on Russia. (By Brian Bockelman)

Turkish ultimatum calls upon Russia to stop encroachment in Danube region. This is another in a growing set of grievances that will lead eventually to the Crimean War. (By Brian Bockelman)

Turks reject Russian claims in the Ottoman Empire further raising tension that will eventually lead to war. (Brian Bockelman)