Complex sentence: He fought against the Cossacks again during Chmielnicki Uprising in 1648-1651, commanding defence of Zbaraż in 1649, and in the battle of Beresteczko in 1651, and also took considerable efforts to protect his Jewish subjects.
Split into simpler sentences: He fought against the Cossacks again during Chmielnicki Uprising in 1648-1651, commanding defence of Zbaraż in 1649, and in the battle of Beresteczko in 1651. He also took considerable efforts to protect his Jewish subjects.