Complex sentence: It would again seen conflict during War of 1812; in 1814 British warships attacked Fort McHenry in Baltimore; in a separate attack, British troops sailed up the Chesapeake, landed on the west side near Washington D.C., and trekked overland to burn the capital.
Split into simpler sentences: It would again see conflict during War of 1812; in 1814 British warships attacked Fort McHenry in Baltimore. In a separate attack, British troops sailed up the Chesapeake, landed on the west side near Washington D.C., and trekked overland to burn the capital.