The following is a tidbit I found on the Internet from the ST: TNG Officer's Manual for the FASA Star Trek RPG.
"Imperial Klingon States
Not all the inhabitants of worlds formerly part of the Imperial Klingon Empire have gracefully abandoned their predatory ways. More than one member of the Klingon Imperial Navy has sought the refuge of deep space rather than submit to the common good of peace. Indeed, there are thousands of Klingon "refugees" living in the Imperial Klingon States, located in the Triangle Zone between the borders of the Alliance and the Romulan Star Empire. These dissidents gather in small groups to plot continued violence against the hated Federation and their so-called "traitorous" brethren who have joined the Grand Alliance. From their earliest days, the "neutral" Imperial Klingon States were a haven for disillusioned or frustrated glory-seekers from the old Empire. Recent migrations of ex-Imperial Klingons have brought the Imperial Klingon States much-needed manpower and combat-capable vessels, as well as the disturbingly deluded vision of the Klingons' supreme right of conquest and the necessity of war as the natural order of things."