The oldest Pre-Contact trade routes were the richest. Most of them started or went through Alpha Centauri due to how its three stars twisted hyperspace. Alpha Centauri hyperspace runs were the fastest way to get anywhere and Alpha Centauri was home to the first Extra-Solar orbital elevators and the largest warehouse complexes we had yet built. Alpha Centauri was the one place other than Earth every company that styled itself an interstellar player simply had to be at. That is why Alpha Centauri became such a large target during The War. Everyone wanted it.