Thread:Treebeard1010102/@comment-5080468-20160504120641/@comment-5080468-20160505160037

Two colonies on the same planet without contact sounds too unrealistic to me, but same system or same sector should be acceptable. Another idea would be that we contact eachother and mark a set border between our two empires; however, a lush and fertile planet is found directly at the border, and ultimately, settlers from both sides arrive in the system. Maybe the settlers will not even argue about the planet as a whole but about a certain region that is resource-rich or about hunting rights to a native animal or about a controversial dam project at one of the planet's larger rivers that could supply the colonies with energy.

Both sides claim the planet (or certain areas) as theirs and found cities; small rural skrimishes between farmers and neighboring villages that are loyal to different sides eventually lead to the intervention of the police and army; then a nervous commander from one of the sides launches a nuclear strike or causes another incident that then becomes the casus belli.