North Caucasus Line

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The North Caucasus Line (Russian: Кавказская линия) was a line of Russian forts and Cossack settlements along the north side of the Caucasus Mountains. Originating in the mid-16th century with a small number of free Cossacks near the Caspian Sea, from the mid-18th century the line was pushed west and used as a base to conquer the mountains to the south and to populate the steppes to the north.