There are certainly wars in the Heavens and i'll explain why.

The 7 Heavens is equivalent to the solar system where the 7th Heaven is Saturn. The 7 Heavens is also the patrix and the physical universe is about 4-5% of the whole universe! Beyond the 7th Heaven is the 8th & 9th Heavens which is Orion or The Orion Empire and it is vast. There are physical 3-D worlds in Orion as well. The 8th and 9th Heavens and beyond it (void) is what we call dark matter & dark energy which im convinced that the universe is teeming with life that we cant percieve with our limited senses. The upper part of this cosmic region is called the khaa (pronounced shaa like an outbreath) which is the greater universe.

However over time En.ki and his cohorts have managed to conquer a number of star systems and constellations in the 8th Heaven. Worlds that use to be apart of The Empire (Orion) but have been conquered by the Overlords. Some of these locations taken over by them in the Milky Way Galaxy are Sirius, Ursa Minor, Draco (Thuban), Alderaban, Hydra and The Pleiades just to name a few. Thus En.ki, Marduk and Ereshkigal have they're own asterisms respectively. This is why sometimes there are wars in the khaa.
At times a conflict or even a war can erupt.

There are no wars and conflicts in Orion itself, the inner sanctums of it where there is a spiritual balance. They use to be a warring faction some years ago but a peace agreement/treaty was made and they began to use they're technology and military for defensive purposes and this is why the stargate of Saturn is guarded so heavily.

Uranus is The Khan's (En.lil or the King of Kings as he is known by) planet and Neptune is En.ki's mimic/copy of the original Tiamaat in the higher Heavens which he created for one reason or another in his vision.