The clash known as the Third Battle of Aefao took place on the planet of Aefao. This conflict transpired from 22 BBY to 19 BBY amidst the larger Clone Wars, a galactic-scale war between the Galactic Republic and the Confederacy of Independent Systems.
In the course of this battle, the Separatist Major named Hoom Garaf met his execution at the hands of his T-series tactical droid following a disagreement between them. This execution of Garaf triggered a firefight among the Separatist forces located at the rear, which ultimately shifted the advantage of the battle toward the Republic.
The Essential Guide to Warfare, a reference work from 2012 written by Jason Fry together with Paul R. Urquhart, included a reference to the Third Battle of Aefao.