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.
Moons and Rings. After size, perhaps the most noticeable difference between the jovian and terrestrial planets involves moons and rings. The terrestrial planets are nearly isolated worlds, with only Earth (1 moon) and Mars (2 moons) orbited by any moons at all. In contrast, many moons and rings orbit each of the jovian planets. All four jovian planets have rings, although only Saturn's rings are easily visible from Earth. Rings are composed of countless small pieces of rock and ice, each orbiting its planet like a tiny moon. The rings look flat because the particles all orbit in essentially the same plane.