Complex sentence: They do so, and end up wreaking havoc in training camp.Hardy fed up with the harsh discipline and the endless punishments, writes a highly insulting letter to the camp seargent which also announces that he & Laurel are leaving-and signs it.
Split into simpler sentences: They do so, and end up wreaking havoc in training camp. Hardy, fed up with the harsh discipline and the endless punishments, writes a highly insulting letter to the camp seargent which also announces that he and Laurel are leaving--and signs it.