Major General in the New York state militia, Van Rensselaer had not commanded troops in battle and was not a warrior, being considered the leading Federalist candidate for the governorship of New York. Possibly hoping to get Van Rensselaer out of the way, New York Governor Daniel Tompkins had put Van Rensselaer's name forward to command the army on the Niagara, and he officially took command on 13 July. Van Rensselaer secured the appointment of his second cousin, Colonel Solomon Van Rensselaer, as his aide-de-camp. Solomon van Rensselaer was an experienced soldier who had been wounded at the Battle of Fallen Timbers in 1794, and a valuable source of advice to the General. Prelude British moves Major General Isaac Brock was both the civil Administrator of Upper Canada and Commander of the military forces there. He was an aggressive commander, and his successful capture of Detroit had won him praise, the reputation as the "saviour of Upper Canada" and a knighthood, the news of which would only reach Upper Canada after his death. However, his superior at Quebec, Lieutenant General Sir George Prevost, was of a more cautious bent, and the two clashed over strategy. Brock had hastened back from Detroit, intending to cross the Niagara, defeat Van Rensselaer before he could be reinforced and occupy upper New York State. Prevost vetoed this plan, ordering Brock to behave more defensively. Not only was Prevost concerned by Brock's apparently rash actions, but he was aware that the British Government had revoked several Orders in Council which affected American merchant ships, and thus removed some of the stated causes of the war. He believed that peace negotiations might result and did not wish to prejudice any talks by taking offensive action. He opened negotiations with General Dearborn, and arranged local armistices. The United States government rejected Prevost's approach and ordered Dearborn "to proceed with the utmost vigor in your operations", after giving Prevost notice of the resumption of hostilities. However, it took several weeks for this correspondence to travel between Washington and the frontier. While Brock had been at Detroit, Major General Sheaffe had been in command of the troops on the Niagara. Acting under Prevost's orders, Sheaffe had concluded an armistice with Colonel Van Rensselaer on 20 August and had even gone further than Prevost's orders by voluntarily restricting the movement of British troops and supplies. Brock returned to the Niagara