The Battle of Alkmaar was fought on 2 October 1799 between forces of the French Republic and her ally, the Batavian Republic under the command of general Guillaume Marie Anne Brune, and an expeditionary force from Great Britain and her ally Russia, commanded by Prince Frederick, Duke of York and Albany in the vicinity of Alkmaar during the Anglo-Russian invasion of Holland. The battle ended in a Anglo-Russians victory, forcing Brune to order a strategic withdrawal the next day to a line between Monnickendam in the East and Castricum in the West. There the final battle of the campaign would take place on 6 October.

The Battle of Castricum saw a Franco-Dutch force defeat an Anglo-Russian force near Castricum, Netherlands. The battle was fought during the War of the Second Coalition against Revolutionary France between French and Dutch forces under the command of General Guillaume Brune and Herman Willem Daendels and British and Russian forces under the command of the Duke of York, Sir Ralph Abercromby and the Prince of Orange.