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The Battle Beyond the Volga was Kasym Khan's western campaign against the Nogai Horde in 1513, where Kasym Khan defeated the Nogai Murzas for having gone beyond the Volga.
In the autumn of 1513, Kasym, having sent away the Moghul Khan Sultan Said, moved his troops westward and defeated the Nogai murzas, forcing them to retreat beyond the Volga. Seizing the opportunity, the Crimean Khan Muhammad Giray launched a campaign in the summer of 1515 to strike the Nogais from the other side.
Source
Radik, Temirgaliev (2013). Ak-horde. The history of the Kazakh Khanate (in Russian). Almaty. p. 153. ISBN978-601-80213-1-2.{{cite book}}: CS1 maint: location missing publisher (link)