Complex sentence: She bombarded and destroyed San Juan del Norte, Nicaragua, 13 July 1854 in retaliation for actions against American citizens there, and protected the disputed fisheries along the coast of Nova Scotia from 2 September to 30 October 1857.
Split into simpler sentences: She bombarded and destroyed San Juan del Norte, Nicaragua, 13 July 1854 in retaliation for actions against American citizens there. The ship afterward protected the disputed fisheries along the coast of Nova Scotia from 2 September to 30 October 1857.