The states that were in sympathy with his administration responded, the
others ignored the call.

General Dru learned that large reinforcements had been ordered to
Chicago, and he therefore at once moved upon that place. He had a fair
equipment of artillery, considering he was wholly dependent upon that
belonging to the militia of those states that had ranged themselves upon
his side, and at several points in the West, he had seized factories and
plants making powder, guns, clothing and camp equipment. He ordered the
Iowa division to advance at the same time, and the two forces were
joined at a point about fifty miles south of Chicago.

General Newton was daily expecting reenforcements, but they failed to
reach him before Dru made it impossible for them to pass through.

Newton at first thought to attack the Iowa division and defeat it, and
then meet the Wisconsin division, but he hesitated to leave Chicago lest
Dru should take the place during his absence.

With both divisions united, and with recruits constantly arriving, Dru
had an army of one hundred and fifty thousand men.

Failing to obtain the looked-for reenforcements and seeing the
hopelessness of opposing so large a force, Newton began secretly to
evacuate Chicago by way of the Lakes, Dru having completely cut him off
by land.

He succeeded in removing his army to Buffalo, where President Rockland
had concentrated more than one hundred thousand troops.