When Gascoigne sailed as a soldier of fortune to the Low Countries in 1572, his ship was driven by stress of weather to Brielle, which luckily for him had just fallen into the hands of the Dutch. He obtained a captain's commission, and took an active part in the campaigns of the next two years including the Middelburg siege, during which he acquired a profound dislike of the Dutch, and a great admiration for William of Orange, who had personally intervened on his behalf in a quarrel with his colonel, and secured him against the suspicion caused by his clandestine visits to a lady at the Hague.