General Stanwix was accordingly sent to reinforce Fort Duquesne, and, having made that position secure, to press forward, if possible, up the Alleghany and French Creek rivers, in order to co-operate with another force which, under General Prideaux, was ordered to ascend the Mohawk river, {294} reoccupy Oswego, and from Oswego as the base to attack Niagara. Prideaux concentrated his troops at Schenectady towards the end of May, about 5,000 in number, including two regiments of regulars. Sir William Johnson joined him with Indian warriors from the Five Nations; and with him too, as second in command, was Colonel Haldimand, like Bouquet a Swiss by birth, and twenty years later Governor-General of Canada. Strengthening the outposts on the line of communication as he advanced, Prideaux made his way to Oswego, and, leaving Haldimand there to rebuild the fort, started westwards on July 1 for Niagara, carrying his men in boats along the southern shore of Lake Ontario. Soon after he left, Haldimand's force at Oswego was attacked by 1,000 Canadians and Indians, who came up the St. Lawrence under the command of St. Luc de la Corne; but, though taken by surprise, the garrison beat off their assailants with little loss. [Sidenote: _Fort Niagara._] The French fort at Niagara was in good condition for defence. It stood in the angle between the Niagara river and the lake, on what is now the American side of the river; a road had been made past the falls, and there were two outposts, one above and the other below the falls. A competent French officer, Pouchot, was in command; his garrison, when the English appeared, numbered 500 men more or less, and he sent messages to bring up reinforcements from the forts on the Ohio route--Presque Île, Fort Leboeuf, and Machault or Venango--in addition to Indians and Rangers from Detroit and the west, who were already coming down to the aid of Canada. [Sidenote: _Death of Prideaux._] [Sidenote: _Johnson takes command and defeats the French relief force._] [Sidenote: _Surrender of Niagara._]