Which regions had no concerted efforts to end slavery despite the Royal Navy’s patrols?

The regions where no concerted efforts were made to end slavery despite the Royal Navy's patrols encompass East Africa and the Red Sea. During the 19th century, despite the Royal Navy's increased presence and efforts to suppress the slave trade, these areas continued to engage in the slave trade, largely due to local practices and the presence of established slave markets.

East Africa, in particular, had a long-standing history of slave trading that was deeply rooted in local economies and social structures, making it challenging for external forces, like the Royal Navy, to impose significant change. The Red Sea region, adjacent to East Africa, similarly maintained its trade routes, which facilitated the continued movement of enslaved people. Therefore, the combination of entrenched economic interests and limited reach of naval patrols contributed to the lack of effective measures to abolish slavery in these regions at that time.

In contrast, other regions mentioned have historical contexts that either demonstrated more active abolitionist efforts or were heavily influenced by the Royal Navy's anti-slavery campaigns, resulting in noticeable changes to the practice of slavery.