SD Gundam Gaiden 2: Entaku no Kishi

Sudha Doaka World, a world where humans and MS tribes live in peace. There is a kingdom here, ruled by the MS King, King Gundam. The kingdom has a group of knights, who are called the "Knights of the Round Table" because they gather around a round table. A long period of peace ensued. The Knights of the Round Table were on their own journeys. One day, the Empire invaded. With overwhelming force, the imperial army surrounded the kingdom. Seven years after the invasion...