b Sources are contradictory as to whether the namiestnik had competence in the military realm. Certainly from 1815 to 1831 the Congress Kingdom's military was controlled by Grand Duke Constantine Pavlovich of Russia, who "de facto" had more power than the namiestnik, Józef Zajączek. Zajączek died in 1826 and was not replaced until 1831, when the November 1831 Uprising saw Ivan Paskevich assume the post of namiestnik—as well as command of Russian military forces in the region, as he was tasked with defeating the Uprising. The question of who controlled the military after Paskevich's death is unclear, but again the last namiestnik, Fyodor Berg, was tasked with crushing another Polish uprising—the January 1863 Uprising—and commanded the military.