The British Government, however, moved forward its troops into Flanders reluctantly, firstly, because it wanted to use them in the West Indies,[219] and also discerned the preference of Frederick William for a Polish to a Flemish campaign. That monarch and his generals left the Austrians to bear the brunt of everything on the banks of the Rhine, and also in Brabant. His manner of setting about the siege of Mainz was a masterpiece of politic delay, in which amorous dalliance played its part.[220] When complaints came from his Allies, he hotly retorted that Coburg had sent him only 5,000 troops from the northern army instead of the 15,000 that were promised. The Austrians replied with no less warmth that Coburg needed those 10,000 men because he had had no succour from the Prussian force supporting him. The result was that the Duke of York's corps was thrust into the part which the Prussian contingent ought to have taken. Accordingly Pitt and some of his colleagues deemed it preferable, now that Holland was safe, to withdraw the British troops with a view to a series of expeditions against the coasts and colonies of France. This problem called for a clear and decided solution. Nowhere do we so much lament the secrecy of Cabinet discussions as on these questions--should the meagre forces of Britain be used on maritime expeditions (their normal function in war), or form a petty division in the crusade of two great Military Powers; or, worst of all, should they be parcelled out in both kinds of warfare?
All that we know is that George III, on 29th March, strongly advocated the siege of Dunkirk, in the hope that the capture of that seaport would assist the Austrians in reducing the fortresses of French Flanders, and thus put an end to the war. On the other hand, the Duke of Richmond counselled the withdrawal of the British force for use against the coasts and colonies of France; and his two letters to Pitt, dated Goodwood, 3rd and 5th April, show that Pitt inclined to that opinion. The question was important in view of a forthcoming conference of the allied commanders and envoys at Antwerp. The letters are too long for quotation. In that of 3rd April the duke declares that Ministers must soon decide whether to persevere in Flanders or in maritime expeditions. "To attempt both is to do neither well." For himself, he would much prefer to attack Cherbourg, Brest, l'Orient, Rochefort, Nantes and Bordeaux; but he fears that the ardour of the Duke of York will lead him into an extensive campaign in Flanders.