What do I need to make up before I reach uc?

Actually, you don't need to make up that much. You just need to know the general plot. First of all, you should understand that the calendar year in UC world is the century of the universe. In UC000 1 year, human beings set up the first colonial satellite in space, which seems to be the year when the Earth Federation was founded. In UC0079, a new country composed of space immigrants asked the Principality to declare war on the Earth Federation in the name of seeking the independence of the inhabitants of the universe. This period of history is called the one-year war. At the beginning of the war, Jean Principality landed a colonial satellite on the earth, killing more than 3 billion people in a week (this is often mentioned in unicorns). Later, in UC0080, the war ended in a federal victory, and Kirian Zabi was killed. However, the war is not really over. The remnants of the New Jean Party and the Federation have been fighting intermittently for more than ten years. In UC0093, the red comet Xia Ya, on behalf of Jean, launched a counterattack against the Earth Federation. In this battle, the protagonist Amro from generation to generation died with Xia Ya. The century of the universe is over. Unicorns can be said to be a supplement to the century of the universe. It happened in UC0096. It is said that a Laplace box in the hands of Bist, a big consortium, which can destroy the Federation, has become the focus of competition between the Federation and the new Jean, and the key to this box is the unicorn Gundam of the male owner. Handmade, give points.