The Indians, after their defeat at Fort Ridgely and New Ulm, had concentrated at the Yellow Medicine river, and decided to make one more desperate effort to carry their point of driving the whites out of the country. Their plan of operation was, to come down the Minnesota valley in force, stealthily, passing Sibley's command at Ridgely, and attacking St. Peter and Mankato simultaneously. They congregated all their forces for this attempt, and started down the river. When they reached the foot of Birch Coulie they saw the last of Major Brown's command going up the coulie. They decided to wait and see where they encamped, and attack them early in the morning. The whites went to the upper end of the Coulie, and camped on the open prairie, about 250 feet from the brush in the coulie. On the other side of their camp there was a roll in the prairie, about four or five feet high, which they probably did not notice. This gave the enemy cover on both sides of the camp, and they did not fail to see it and take advantage of it. The moment daylight came sufficiently to disclose the camp, the Indians opened fire from both sides. The whites had ninety horses hitched to a picket rope and their wagons formed in a circular corral, with their camp in the center. The Indians soon killed all the horses but one, and the men used their carcasses as breastworks, behind which to fight. The battle raged from the morning of September 2d to September 3d, when they were relieved by Colonel Sibley's whole command, and the Indians fled to the west. Major Joseph R. Brown was one of the most experienced Indian men in the country, and would never have made the mistake of locating his camp in a place that gave the enemy such an advantage. He did not arrive until the camp was selected, and should have removed it at once. I have always supposed that he was lulled into a sense of security by not having seen any signs of Indians in his march; but the result proved that, when in a hostile Indian country, no one is ever justified in omitting any precautions. The firing at Birch Coulie was heard at Fort Ridgely, and a relief was sent, under Colonel McPhail, which was checked by the Indians a few miles before it reached its destination. The colonel sent a courier to the fort for reinforcements, and it fell to Lieutenant Sheehan to carry the message. With his usual energy he succeeded in getting through, his horse dying under him on his arrival. Colonel Sibley at once started with his whole command, and when he reached the battle ground the Indians left the field.