What happens between Halo 2 and Halo 3

what happens is after you stop the brute chieften tarterus from lighting all 7 of the halo rings you appear back to master chief and you fun through the covenunt holy city high charity facing brutes elites grunts jackels hunters whatever they can throw at to but the best part is there all fighting amongst themselfs. you can sit and watch or fight too but the flood comes in the wrecked friguet inamberclad, so that just adds the flood to the list your mission is to stop truth at all cost so after you make it to the end of the city you see truth escaping into a forrunner ship to teliport onto the ship before it gos into slipspace and from there the ship is headed to earth and that's how the battel is brought back to earth and that's where to take a life pod of the ship in halo 3 and crash land and jonson finds you