The siege of Cassel (March 1761) was a failed attempt by Duke Ferdinand of Brunswick to capture French-held Kassel, the capital of Hesse-Kassel. Brunswick lifted the siege after forces of the Duc de Broglie inflicted heavy casualties on his forces at the Battle of Grünberg, making continuation of the siege untenable.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (September 2014) (Learn how and when to remove this message)

• The History of the Seven Years War in Germany

51°19′11″N 9°29′52″E / 51.3197°N 9.4978°E / 51.3197; 9.4978