Complex sentence: Evertsen returned to the Netherlands in July 1674 and was accused of disobeying his orders which were not to retake New Amsterdam but to conquer the British colony on Saint Helena and Cayenne (now French Guiana).
Split into simpler sentences: Evertsen returned to the Netherlands in July 1674, and was accused of disobeying his orders. Evertsen had been instructed not to retake New Amsterdam but to conquer the British colonies of Saint Helena and Cayenne (now French Guiana).