The Alliance Navy is the naval branch of the Alliance, a coalition of various planets and species in the Mass Effect universe. It is responsible for space defense, exploration, and maintaining peace among its member worlds. The navy operates a range of ships, from small frigates to large capital ships, and is equipped with advanced technology to engage in combat and support missions. The Alliance Navy plays a crucial role in protecting human interests and collaborating with other species, such as the Asari and Turian fleets. Its personnel undergo rigorous training to prepare for various challenges, including combat against hostile forces like the Reapers and Cerberus.