Why did Celestial Dragons fight?

Draco is cruel by nature and loves war. Their race was abandoned in Alfa Draco or did not evolve in the right way, but they are very smart and have incredible mental ability and creativity, so their science and technology are developing very fast.

After the rapid development of science and technology, they mastered the mystery of interstellar travel and began to invade and expand foreign planets. Almost all wars in the galaxy are related to them to some extent.