Britain had been surprised by the sudden Prussian offensive but now began shipping supplies and ₤670,000 (equivalent to ₤89.9 million in 2015) to its new ally. A combined force of allied German states was organised by the British to protect Hanover from French invasion, under the command of the Duke of Cumberland. The British attempted to persuade the Dutch Republic to join the alliance, but the request was rejected, as the Dutch wished to remain fully neutral. Despite the huge disparity in numbers, the year had been successful for the Prussian-led forces on the continent, in contrast to disappointing British campaigns in North America.
Why did the Dutch reject Britain's offer to join the alliance?
the Dutch wished to remain fully neutral