Complex sentence: The squadron passed through the Straits of Gibraltar on 2September, stopping at Cartagena on 10September to pick up supplies, and on 28September arrived at its destination, where it was reinforced with five other men-of-war.
Split into simpler sentences: The squadron passed through the Straits of Gibraltar on 2September, before stopping at Cartagena on 10September to pick up supplies. On 28September it arrived at its destination, where it was reinforced with five other men-of-war.