Llanwnda is a rural village and parish to the north of the Welsh county of Pembrokeshire and part of the community of Pencaer. It lies some two miles northwest of the port of Fishguard and is inside the boundaries of the Pembrokeshire Coast National Park.

The Battle of Fishguard was a military invasion of Great Britain by Revolutionary France during the War of the First Coalition. The brief campaign, on 22–24 February 1797, is the most recent landing on British soil by a hostile foreign force, and thus is often referred to as the "last invasion of mainland Britain".