Doesn't seem to have been much of a thing for the units that actually went to the Hegemony with Amaris, the Patriot units notwithstanding. I can think of an instance of AEAF troops on Venus working with the SLDF, but that was more of a "for survival" thing.
The units left behind to defend the Rim Worlds Republic itself, however, saw decent numbers defect to the SLDF, though probably not the units belonging to Imperial Division Tadeo Amaris. There was something of a civil conflict that happened as all the long-suppressed elements of anti-Amaris sentiment emerged to fight the loyalists, including within RWA units themselves.
