The Sand War escalated to a point where the Bright Republic's infrastructure constantly came under threat.
The pressure exerted by the sandman invaders hadn't faded at all after the CFA warfleet killed the sandman emperor and demolished the capital of the sandman empire.
Like bots following their programming to the very end, the sandman admirals constantly drove their fleets into human star systems and did not hesitate to fight unwinnable battles!
The lack of self-preservation exhibited by the remaining sandman leaders cast a very dreary cloud over the Bright Republic.
If they faced a human opponent like the Vesians, then the war would have ended by now. No one liked to wage war where the price was higher than the cost.
Only the sandmen, who did not appear to value their lives at all, were crazy enough to drive their race to extinction!