Complex sentence: He was awarded the Order of St George (3rd Class) for his participation of the capture of Izmail in 1790 but later disgraced by emperor Paul and confined to the Peter and Paul Fortress.
Split into simpler sentences: He was awarded the Order of St George (3rd Class) for his participation of the capture of Izmail in 1790. Disgraced by emperor Paul, he was confined to the Peter and Paul Fortress.