 This was amply demonstrated by the Royal Marine Artillery, as well as in the crossing of the Adour River and the Battle of Toulouse.Their lack of specific accuracy with the larger rockets at long range was not a problem if the purpose was to set fire to a town or a number of moored ships; this was shown with the attack on the French Fleet in Aix and Basque roads and at the bombardment of Copenhagen.As Congreve himself had warned, however, they were of little use against fortified places, such as against Fort Henry, because of the lack of combustible structures.