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.
Most of the other planets in our solar system also have moons. The number of moons ranges from one for the Earth, to as many as 21 for Uranus. Two of our planets, Mercury and Venus, have no moons. Jupiter has 16 known moons, Saturn has 18, and Neptune has 8. Pluto has one moon, but this moon is so large in comparison that many astronomers consider the two objects to be a double planet rather than a planet and a moon. Moons also vary greatly in size.