Shiss / Nul Betrayal

On two occasions the Shiss and Nul entered into brief alliances to fight a common enemy. Both times the Shiss betrayed the Nul.

After the second time, the Nul made a decision to not enter into any alliances. That remained their policy until Xon, the grey prince came into contact with the crew of the USS Tigershark, after Captain Erica Olafson saved his life in a Death Arena on Sin 4 shortly before that world became part of the Union.

First Shiss Nul alliance and betrayal
The first time the Shiss and Nul fought against a common enemy, it was against the Y'All. The combined fleet fought some battles protecting some Shiss Planets, but after the Y'All started targeting Nul territory it was sugested by the commander of the Shiss forces that a final stand would be made a certain location.

The combined fleet arrived at the location that had been suggested shortly before the arrival of the Y'All. When the first ships of the Y'All fleet arrived within sensor range, the Shiss fled through a minefield placed behind the Shiss, after fireing at their former allies.

While the Nul military was weakened, the Shiss proceded to capture a number of Nul Colonies.

Second Shiss Nul alliance and betrayal
The second time the Nul entered into an alliance with the Shiss it was to fight a new common enemy - the Union. This time the trap involved a computer virus that disabled the engines of the Nul warships leaving them vunerable to attacks by Union Ships.

The virus worked and for the second time the Shiss' betrayal caused major destruction to the Nul fleet.

Consequences
The two betrayals caused the Nul to be suspicious of other societies. It was only after the events on Sin 4 that the Nul decided to change their policy of relative isolation.

When the Union declared war on the Shiss, there was a large number of Nul veterans who volunteered to fight. Those that had trained as members of the Union Military were mostly accepted. Others boarded several thousand of the Nul warships that had been decommissioned as a part of the Nul joining with the Union and launched their own attacks against the Shiss.

Admiral Stahl reporting to the Assembly mentioned the following "The hardest part in this war was attempting to moderate the actions of the Purple Shiss and the Nul.  That was not always possible as the future asteroid belts and the P bombed planet will attest."