Complex sentence: Under the command of Sir Henry Havelock, the 78th was instrumental in the first British thrust down the Ganges into rebel held territory, and led the recapture of the town of Cawnpore on 16 July.
Split into simpler sentences: Under the command of Sir Henry Havelock, the 78th was instrumental in the first British thrust down the Ganges into rebel held territory. The 78th was involved in the recapture of the town of Cawnpore on 16 July.