Nikolay Lebedenko was a Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n military engineer, mostly known as the main developer of the Lebedenko Tank, or the Tsar Tank

Tsar Tank

The Tsar Tank , also known as the Netopyr which stands for pipistrellus or Lebedenko Tank , was an unusual Russian armoured vehicle developed by Nikolai Lebedenko , Nikolai Zhukovsky , Boris Stechkin , and Alexander Mikulin...

, which was the largest armored vehicle in history, constructed in 1916–1917. Lebedenko was employed in a private firm, that worked for the Russian War Department, designing artillery devices before and during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

.