The other sword used by Arthur Pendragon is known as the Sword in the Stone and was nothing more than an extravagant typical broadsword that was used by his father, Uther Pendragon. When Arthur was born, Uther was slain in battle. Merlin took this sword and jammed into the rock and enchanted it so that only the true heir of Uther Pendragon could pull the sword. Arthur’s half-sister, Morgan le Fay was not the heir as long as Arthur was alive and is why she never claimed the blade of her father. This is not Excalibur, despite a lot of popular movies, books and cartoons making the blades the same.
Eventually Arthur came to the sword in the stone and retrieved it, making himself the king of Britain. Merlin gave him his support and Arthur went on to gather the people under the new banner of Pendragon. That would also involve some battles as Arthur’s father was a warmonger and not very well liked by several rulers. Many lords joined with Morgan le Fay, Arthur’s half-sister, who felt cheated out of the throne by a brother she didn’t know existed.