Although the Winnebagos and the Pottawatomies had resolved to take no part in the war, yet a few young warriors from each of these tribes, emboldened by Black Hawk's easy victory over Stillman's raw recruits, decided to join his band. These committed many depredations among the settlements along the Fox and Illinois rivers.
When the warriors returned from their hunting expedition, Black Hawk concentrated his entire force, consisting of about five hundred warriors, according to his own statement, at a point between the Rock and Wisconsin rivers.
General Atkinson, with a force of nearly two thousand men, pressed on to meet him. But the wily chief declined to risk a battle with such odds and withdrew into the wilderness. General Atkinson followed, incurring the danger of an ambuscade, but Black Hawk could not be brought to a stand.
When Black Hawk reached the Mississippi River, he let most of his women and children descend it in canoes, but a majority were captured by the whites and quite a number drowned.
With the main body of his warriors he approached the river, intending to cross, but was met at this point by the steamboat Warrior.
The chief was so touched by the suffering of the women and children, the starving condition of his men, and the utter hopelessness of continuing the unequal struggle, that he decided to surrender. Accordingly, he sent a hundred and fifty warriors to the edge of the stream with a flag of truce. An effort was also made to communicate with the Winnebago interpreter on board the boat. But either the interpreter failed to understand what was shouted to him by the Indians on shore or he was treacherous and failed to report the message correctly to Captain Throckmorton, of the Warrior, or Lieutenant Kingsburg, who commanded the troops, for certain it is those on the boat paid no attention to the white flag of truce or the expressed desire on the part of Black Hawk to surrender.
Orders were given to shell the Indians on the shore with musketry and a six-pounder loaded with canister. It resulted in killing twenty-three Indians outright and wounding a large number. The savages were trying to surrender, and were so astonished at this unexpected attack, that they fired only a few random shots, one of which passed through a man's leg on the Warrior.
As the wood began to fail, and night was approaching, the Warrior went on to Prairie du Chien. The final battle of the war occurred the next day, August 2. This is known as the battle of Bad Axe and was fought where the little stream by that name joins the Mississippi. The account we give of it is quoted from Black Hawk's autobiography, in which the chief said: "Early in the morning a party of whites, being in advance of the army, came upon our people, who were attempting to cross the Mississippi. They tried to give themselves up; the whites paid no attention to their entreaties, but commenced slaughtering them. In a little while the whole army arrived. Our braves, but few in number, finding that the enemy paid no regard to age or sex, and seeing that they were murdering helpless women and little children, determined to fight until they were killed. As many women as could commenced swimming the Mississippi, with their children on their backs. A number of them were drowned, and some shot before they could reach the opposite shore.
"This massacre, which terminated the war, lasted about two hours. Our loss in killed was about sixty, besides a number that was drowned. The loss of the enemy could not be ascertained by my braves exactly; but they think that they killed about sixteen during the action."
It was afterward estimated that the loss of the Americans in killed and wounded was twenty-seven—that of the Indians nearly two hundred.