The Battle of Grobnik field is a legendary battle that supposedly occurred in 1242 between the Croats and the Mongols (also called "Tatars") of the Golden Horde in the area below the Grobnik Castle in the present-day Čavle municipality in Primorje-Gorski Kotar County, western Croatia.

The legend was recorded as late as the 16th century and was later a focus of an early romantic poem The Grobnik Field written in 1842 by Dimitrija Demeter for the 600th anniversary of the battle.

Legend has it that, in a last-ditch struggle, Croats from all over the region gathered at the field and killed thousands of Mongols, who withdrew, never to return.

[citation needed] Arriving at the Grobnik field, the Mongols encountered a native Croatian army that tried to stop their advance and invasion.

Legend also has it that the Croats also fought off a Turkish invasion at Grobnik field several centuries later by wearing the heads of cows and other animals (see zvončari), scaring the enemy.