French remained in control of Fort Duquesne until 1758, when an expedition under General John Forbes finally succeeded in taking the fort. Word of the British military plans leaked to France well before Braddock's departure for North America, and King Louis XV dispatched a much larger body of troops to Canada in 1755. Although they arrived too late to participate in Braddock's defeat, the French troop presence led to a string of French victories in the following years. Royal Navy Admiral Edward Boscawen led a small squadron of ships which attacked the French ship Alcide in a naval action on June 8, 1755, capturing her and two troopships transporting some of those soldiers to North America. Military actions continued to performed on both North American soil and at sea until France and Britain declared war on each other in spring 1756, marking the formal start of the Seven Years' War. Propaganda and analysis Because of the inconsistent nature of the record of the action, contemporary and historical coverage of it has been easily colored by preferences for one account over another. Francis Parkman, for example, accepted Washington's account, and was highly dismissive of the accounts by Monceau and the Indian. French authorities assembled a dossier of documents to counter British accounts of the affair. Entitled "Mémoire contenant le précis des faits, avec leurs pièces justificatives, pour servir de réponse aux 'Observations' envoyées par les Ministres d'Angleterre, dans les cours de l'Europe", a copy was intercepted in 1756, translated, and published as "A memorial containing a summary view of facts, with their authorities, in answer to observations sent by the English ministry to the courts of Europe". It used Washington's capitulation statement and other documents, including extracts of Washington's journal taken at Fort Necessity, to suggest that Washington had actually ordered the assassination of Jumonville. But not all Frenchmen agreed with the story: the Chevalier de Lévis called it a "so-called assassination". The French story contrasted with that of the British account. Based on Washington's report, the British suggested that Jumonville, rather than being engaged on a diplomatic mission, was spying on them. Jumonville's orders included specific instructions to notify Contrecœur if the summons was read, so that additional forces might be sent if needed. Historian Fred Anderson theorizes about the reasons for Tanacharison's action in the killing, and provides a possible explanation for why one of Tanacharison's men reports the