It was not until two days later that (in the words of a soldier writing to his wife at that time) "General Putnam was made happy by obtaining leave to go over--the brave old man was quite miserable at being kept here," in New York. Only three days after his arrival the battle was fought, which (in brief) was brought about by the British surprising an outpost at one of the three passes to the American rear, on the night of the 26th of August and thus turning the patriots' position. With more than three times the numerical strength of the Americans, the British were successful, and the former lost more than a thousand men, most of them made prisoners, including Generals Sullivan and Stirling. Washington hurried over reenforcements, until there were nearly ten thousand men at the Heights; but Putnam soon found it impossible to conduct its defense against twenty thousand of the enemy, with ten thousand more in reserve, and, with Washington's sanction and cooperation, he withdrew his men from their perilous position by a night retreat across the river, which was a triumph of military sagacity and achievement. The more than nine thousand men, with their ammunition, arms, provisions, etc., were safely over the river before the British became aware of what was going on. Then it was too late, and notwithstanding that the Americans had been outflanked and defeated by the most skilful strategy, the British lost the chief fruits of their victory by procrastination. The loss of Long Island meant, of course, the evacuation of New York, since the city could now be commanded by the enemy's guns on the Heights. This movement was decided upon by Washington and his generals at a council of war; the garrison was withdrawn from Governor's Island, and after the surplus ammunition and military stores had been forwarded to a point of safety, the troops leisurely followed after toward the north. Putnam, Heath, and Spencer were placed in command of the three grand divisions into which the army was divided preparatory for retreat and stationed along the East River, Putnam, as usual, having the most perilous situation, at the lower end of the city. To him was committed the removal of the troops and military stores, so that he had no more time at command than formerly.