During which period did Moscow add the greatest amount of land to its territory?

Territorial development

In addition to almost the entire territory of modern Russia,prior to 1917 the Russian Empire included most of Dnieper Ukraine, Belarus, Bessarabia, the Grand Duchy of Finland, Armenia, Azerbaijan, Georgia, the Central Asian states of Russian Turkestan, most of the Baltic governorates, as well as a significant portion of the Kingdom of Poland and Ardahan, Artvin, Iğdır, Kars and northeastern part of Erzurum Provinces from the Ottoman Empire.

Between 1742 and 1867, the Russian-American Company administered Alaska as a colony. The Company also established settlements in Hawaii, including Fort Elizabeth (1817), and as far south in North America as Fort Ross Colony (established in 1812) in Sonoma County, California just north of San Francisco. Both Fort Ross and the Russian River in California got their names from Russian settlers, who had staked claims in a region claimed until 1821 by the Spanish as part of New Spain.

Explanation:

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