The D.R.A.K. Rebellion was a conflict on Kamino where the Republic had asked Palpatine to end the cloning of the D.R.A.K. clones due to the fear of an inside rebellion because of their strength. Due to Palpatine putting the finishing touches on his plan to make the Republic into an Empire, his fears of the D.R.A.K. betraying him due to their closeness with the Jedi because of Drake had caused him to end the cloning. Ironically, this was what caused their rebellion against the Republic, not because they felt like it, but because of the mistrust.