Page 56, 13th Royal Infantry Division
Last Paragraph
"Bad luck would later catch up with the Thirteenth, however. During the Exodus, the Thirteenth told General Kerensky that they would leave with him, but that they required to stop inside the Rift for unspecified reasons and they would meet up at a mustering point later. It was assumed for centuries that the Division left with Kerensky’s loyalists, but Clan records made available to modern researchers show that the Superstition Division never met with the rest of the Exodus fleet. Their fate is still unknown."
The 13th Royal Infantry Division stayed behind and helped Jerome Blake secure Terra, even battling against other former SLDF troops in order to secure Terra during Operation Silver Shield.
Page 13 Comstar Sourcebook
"Using a combined attack with the 13th Royal Infantry Division (The Superstition Division) and remnants of the 251st BattleMech Division's Third Striker Regiment, she finally managed to force the two divisions to surrender..."
I'd suggest changing the entire last paragraph to something about their luck running out because they had to engage former comrades during Silver Shield."