King Arthur (2004)

A young Arthur is living with his family in Sarmatia, a land conquered by the Romans. When the Saxons attack, Arthur's father is slain, and the young boy is saved by Sir Hector, who takes him to be raised in England as a Roman soldier.

Years later, Arthur (now portrayed by Clive Owen) has become the respected leader of a small band of knights known as the Sarmatian Knights. They are about to complete fifteen years of service to the Roman Empire and have been promised freedom. However, before they can be released, they are given one final mission by Bishop Germanius: rescue the son of a Roman nobleman trapped behind enemy lines in the north of Britain.

Arthur and his knights, including Lancelot (played by Ioan Gruffudd), Gawain (portrayed by Joel Edgerton), Tristan (played by Mads Mikkelsen), Galahad (portrayed by Hugh Dancy), and Bors (portrayed by Ray Winstone), embark on their quest. As they travel, they rescue Guinevere (portrayed by Keira Knightley), a Woad warrior who was being held captive by the Romans.

The group discovers that the Saxons, led by Cerdic (portrayed by Stellan Skarsgård), are planning a massive invasion of Britain, using the Roman withdrawal as an opportunity. Arthur decides to return to the Roman villa where he grew up, now abandoned, and use it as a base to defeat the Saxons. They arrive at the villa and prepare for battle.

The Saxons attack, and a fierce battle ensues. However, Arthur realises that many of the Sarmatian Knights, including Lancelot, Gawain, and Galahad, are fighting for a cause they no longer believe in. This causes Arthur to question his own loyalty to Rome. The battle ends in victory for the knights, but Lancelot is captured by the Saxons.

Arthur decides to negotiate with Cerdic for Lancelot's release. He offers himself in exchange but secretly plans an ambush. The ambush is successful, and Arthur stabs Cerdic, killing him. However, during the skirmish, both Tristan and Gawain are mortally wounded.

Returning to the Roman villa, Arthur and his remaining knights celebrate their victory. However, the victory is short-lived, as they receive news that the Saxons have regrouped and are planning another invasion on the night of the Battle of Badon Hill. Arthur and his knights prepare for the decisive battle.

On the night of the battle, the knights engage in fierce combat and manage to win the battle with the help of the Woads, a native warrior tribe led by Guinevere. In the process, Arthur is mortally wounded, but with his last breath, he proclaims that his Knights should be freed and given land in Britain.

The movie ends with Arthur being sent off on a river burial, and the remaining Sarmatian Knights and Guinevere leading the surviving Britons into a new era, establishing the foundation for the Knights of the Round Table and King Arthur's legacy.