Ugra River (Oka) in the context of "Great Stand on the Ugra River"

The Great Stand on the Ugra River (Russian: Великое стояние на Угре) or the Standing on the Ugra River, also known as the Battle of the Ugra, was a standoff in 1480 on the banks of the Ugra River between the forces of Akhmat Khan of the Great Horde, and Grand Prince Ivan III of the Grand Duchy of Moscow.

After Ivan III stopped paying tribute to the Horde, Akhmat Khan led an army towards Moscow, leading to a standoff between the two armies on the banks of the river. Akhmat Khan waited for his Lithuanian reinforcements to arrive, but they never did, with one Mongol attempt to cross the river failing leading Akhmat Khan to retreat. Both armies departed after little fighting. Nevertheless, the outcome of the campaign corresponded to the strategic plan of the Russians to defend the capital and the border from the Tatars.