Complex sentence: He sailed to Antigua in the January of 1759, navy life did not suit Darkin he was court-martialled three times within seven weeks before being appointed to the undemanding role of servant to an officer.
Split into simpler sentences: He sailed to Antigua in the January of 1759. Service life did not suit Darkin and he was court-martialled three times within seven weeks before being appointed to the undemanding role of servant to an officer.