Accordingly, there were "Three Futile Battles of the Island of Britain." They were the Battle of Arfderydd, the battle of Camlann, and the Battle of the Trees. Arfderydd was mentioned in the previous post, because the outcome—the death of Gwenddoleu, ruler of Arfderydd (now Arthuret)—drove his bard Myrddin/Merlin mad, causing him to flee to the forest and live among birds and beasts. This battle is said to have taken place in 573CE, according to the Annales Cambriae, the Annals of Wales.
The Battle of Camlann is also mentioned in the Annales Cambriae, taking place in 537, with very little detail except to call it "strife of Camlann, in which Arthur and Medraut fell, and there was great mortality in Britain and Ireland." Although Medraut is naturally equated to Mordred, there is no clue in the entry that they were enemies.
The Battle of the Trees is a Welsh poem found in a 14th century manuscript, The Book of Taliesin. In it, the Welsh magician and warrior Gwydion enchants the trees to fight as his army against Arawn, lord of the Underworld.
The reason they are called "futile" is because the battles came about because of small, pointless actions. Arderydd is said to have been brought about because of an argument over a lark's nest. The Battle of the Trees comes about when Amaethon, Welsh god of agriculture, steals a dog, a lapwing, and a roebuck from Arawn. Camlann is brought about because of an argument between Gwenhwyfar (Guinevere) and her sister, Gwennhwyfach. Some sources specify this as a slap (hence the illustration above), which became part of another Triad: "The Three Fatal Slaps" or "The Three Harmful Blows of the Island of Britain."
Although this slap, and the hostility between Guinevere and her obscure sister, are not seen outside of Welsh legend, it is interesting that Malory does make Camlann's big battle the result of something "futile": during a parley between Arthur and Mordred, a soldier reflexively draws his sword because he sees a snake in the grass before him. This act causes the opposing side to assume treachery, whereupon they draw their swords, and the fight is on. Something that should be insignificant causes great destruction.
But, as mentioned, the earliest reference to Camlann includes none of this. There were extreme weather events in 535-36 that led to great famine; this could easily have led to fighting between groups struggling for food. Some suggest Camlann was a disastrous cattle raid for food. Next, let's talk about the weather.
