by the British; the captivity of Mangalorean Catholics at Seringapatam ends. May 21 – The Siege of Acre ends after two months; Napoleon's attempt to widen his Middle Eastern campaign into Syria is frustrated by Ottoman forces, and he withdraws to Egypt. May 27 – Battle of Winterthur: Habsburg forces secure control of north-east Switzerland, from the French Army of the Danube. June 7 - Four days of fighting ends in victory for Archduke Charles and the Austrian army over the French army under André Masséna at the First Battle of Zurich June 13 – Ferdinand I of the Two Sicilies is restored to his kingdom following the collapse of the Parthenopean Republic. June 18 – French Revolutionary Wars: Action of 18 June 1799 – A French frigate squadron, under Rear-admiral Perrée, is captured by the British fleet under Lord Keith, off Toulon. July–September July 7 – Ranjit Singh's men take their positions outside Lahore. July 12 – Ranjit Singh captures Lahore from the Bhangi Misl, a key step in establishing the Sikh Empire, and becoming Maharaja of the Punjab. July 15 – In the Egyptian port city of Rosetta, French Captain Pierre Bouchard finds the Rosetta Stone. July 25 – At Aboukir, Egypt, Napoleon defeats 10,000 Ottoman Mamluk troops under Mustafa Pasha. August 27 – War of the Second Coalition – Anglo-Russian invasion of Holland: Britain and Russia send an expedition to the Batavian Republic. August 29 – Pope Pius VI, at the time the longest reigning Pontiff of the Roman Catholic Church, dies as a prisoner of war in the citadel of the French city of Valence, after 24½ years of rule. August 30 – Anglo-Russian invasion of Holland – Vlieter Incident: A squadron of the Batavian Republic's navy, commanded by Rear-Admiral Samuel Story, surrenders to the British Royal Navy, under Sir Ralph Abercromby and Admiral Sir Charles Mitchell, near Wieringen, without joining action. September 10 – Anglo-Russian invasion of Holland - Battle of Krabbendam: the Russo-British expedition force defends its initial gains from attacks by Franco-Dutch forces. September 18 - Victory of Archduke Charles and the Austrian army at the Battle of Mannheim (1799) over a French force under Jacques Léonard Muller September 19 – Anglo-Russian invasion of Holland - Battle of Bergen: Franco-Dutch forces hold their ground against the Russo-British expedition force. September 23 – Frederick North, 5th Earl of Guilford, the Governor of British Ceylon