Gafaelgwn (or in modern English, gafaelgis) are large mastiffs native to the Welsh highlands. These dogs are exceptionally strong and hardy, and for this reason can be a prized addition to your army. Gafaelgwn are not just somewhat strong for a war dog, but are also ideal for sensing and spitting enemies, given their good line of sight. Additionally, the Welsh faction also benefits from the fact that these dogs do not require the Castle Age to be researched, requiring only a Peasants' commune to be trained. So in many cases, these dogs can be used to rip apart enemy formations, although they are somewhat pricey given how long they last in combat.