In this he was disappointed, General Ward refusing to send over any more men, at that time, believing the British would take advantage of his weakened force to make a direct attack upon the main army at Cambridge.

But when, having arrived at the hill, Putnam conversed with Prescott and noted the necessitous condition of the men, he again mounted and in hot haste rode back to Cambridge, with an urgent plea to the commander for assistance.
This time it was not refused, and again gallant Putnam rode across Charlestown Neck, at the risk of his life, to take part in the coming conflict.
Meanwhile, there was a great commotion in the British camps, and from their place of vantage on Breed's Hill the patriots could see the gathering soldiers marching for the shore.

General Gage had quickly called a council, which instantly decided that the patriots must be dislodged at whatever cost.

As the prescient Putnam had foretold, the occupation of a hill so near their lines made their position untenable.
They must move out or fight, and not even Putnam believed they would retreat from their snug quarters in Boston town.

He knew well what was coming, and was not at all surprised to see, gathering beneath the blazing morning sun of the torrid day that had succeeded to a sultry night, the thousands of redcoats, armed and equipped for battle.
After informing the anxious soldiers on the hill of the promised succor to arrive, Putnam rode along the lines and, casting his eye over the situation, perceived that it would be a grave strategic omission to neglect to entrench the hill in the rear, which was the original object of their advance.