The operational level links the tactical employment of forces to national and military strategic objectives through the planning and conduct of operations. The operational level of war is the art and science of winning campaigns. c) Tactical - (mostly Art) The tactical level focuses on planning and executing battles, engagements, and activities to achieve military objectives assigned to tactical units or task forces.
And that's what formed our moon. Why some planets have many moons is basically because of their size. The planets in our solar system that have more moons are the large planets, Jupiter, Saturn, Uranus and Neptune. They're so big that they can collect a lot of moon. If comets swing by them, they can sometimes absorb comets, they can grab asteroids.
In addition to 27 known moons, Uranus has 13 rings, the outer two discovered by the Hubble Space Telescope from 2003-2005. The 13 inner moons of Uranus are intimately involved with the ring system. The moon Mab seems to be the source of the 12th (second to outermost) ring.