Russian Empire
Though the Empire was only officially proclaimed by Tsar Peter I following the Treaty of Nystad (1721), some historians would argue that it was truly born either when Ivan III of Russia conquered Veliky Novgorod in 1478, or when Ivan the Terrible conquered the Khanate of Kazan in 1552. According to another point of view, the term "Tsardom", which was used after the coronation of Ivan IV in 1547, was already a contemporary Russian word for empire.
19th century
It was marked by the collapse of the Spanish, Napoleonic, Holy Roman and Mughal empires. This paved the way for the growing influence of the British Empire, the Russian Empire, the United States, the German Empire (essentially replacing the Holy Roman Empire), the French colonial empire and Meiji Japan, with the British boasting unchallenged dominance after 1815. After the defeat of the French Empire and its allies in the Napoleonic Wars, the British and Russian empires expanded greatly, becoming the world's leading powers. The Russian Empire expanded in central and far eastern Asia. The British Empire grew rapidly in the first half of the century, especially with the expansion of vast territories in Canada, Australia, South Africa and heavily populated India, and in the last two decades of the century in Africa. By the end of the century, the British Empire controlled a fifth of the world's land and one quarter of the world's population. During the post-Napoleonic era, it enforced what became known as the Pax Britannica, which had ushered in unprecedented globalization and economic integration on a massive scale.