Taylor was convicted not only of aiding and abetting Sierra Leone rebels from Liberia, but also for actually planning some of the attacks carried out by Sierra Leone rebel groups, the Revolutionary United Front and the Armed Forces Revolutionary Council.
It isn't clear if the Sierra Leone court's appeal panel will take into account a February appeals judgment by the U.N. Yugoslav war crimes tribunal that acquitted the former chief of staff of the Yugoslav National Army, Gen. Momcilo Perisic, of aiding forces fighting in a neighboring country. Perisic was freed after appeals judges said it hadn't been proven that he sent supplies to Bosnian Serb forces with the "specific intent" that they be used to commit atrocities.
The ruling was seen as raising the bar on the level of proof needed to uphold such aiding and abetting charges, though the Sierra Leone court isn't bound to follow in the Yugoslav tribunal's footsteps.
Taylor's lawyers say he should be acquitted on all counts. Prosecutors asked appeals judges to rule that he was even more closely involved in the crimes in Sierra Leone than was laid out in his original conviction and urged judges to increase Taylor's sentence to 80 years, saying the 50-year sentence wasn't "reflective of the inherent gravity of the totality of his criminal conduct and overall culpability."
If Taylor's sentence is upheld, he will be transferred to Britain, which has agreed to provide a cell for him.
Taylor's trial was moved from the Special Court of Sierra Leone's headquarters in the capital, Freetown, to the Netherlands because of fears it could destabilize the West African region if held in Sierra Leone.
The Taylor appeals ruling will be the final judgment at the court, which indicted 13 of the main architects of the atrocities in Sierra Leone. Two died before trial and one more remains unaccounted for and possibly dead. Another died before hearing a verdict and all the others were tried and convicted.
The court's trial chamber in Freetown will be converted to house Sierra Leone's Supreme Court in the future. Another part of the court is being turned into a peace museum and its detention facility has been put to use as a prison by local authorities.