Peter was nearly always at war, and in spite of the hardships and dangers of the camp and battle-field Catherine always marched with him at the head of the army. The soldiers wondered at her bravery, and learned to like her more than anybody else. If food was scarce, the roads rough, and the marches long, they remembered, that Catherine was with them, and were ashamed to grumble. If she could stand the hardships and face the dangers, they thought rough soldiers ought not to complain.

Catherine was a wise woman as well as a brave one. She soon learned as much of the art of war as Peter knew, and in every time of doubt or difficulty her advice was asked, and her opinion counted for as much as if she had been one of the generals. After she had thus shown how able a woman she was, and had won the friendship of everybody about her by her good temper and her pleasant ways, Peter publicly announced his marriage, and declared Catherine to be his wife and czarina. But still he did not crown her.

This was in the year 1711, and immediately afterwards Peter marched into the Turkish country at the head of forty thousand men. This army was not nearly large enough to meet the Turks, but Peter had other armies in different places, and had ordered all of them to meet him on the march. For various reasons all these armies failed to join him, and he found himself in a Turkish province with a very small number of troops. The danger was so great that he ordered Catherine and all the other women to go back to a place of safety. But Catherine would not go. She had made up her mind to stay with Peter at the head of the army, and was so obstinate about it that at last Peter gave her leave to remain. Then the wives of the generals, and, finally, of the lower officers, wanted to stay also. She persuaded Peter to let them do so, and the end of it was that the women all stayed with the army.

Everything went against Peter on this march. The weather was very dry. Swarms of locusts were in the country, eating every green thing. There was no food for the horses, and many of them starved to death. It was hard for the Russians to go forward or to go backward, and harder still to stay where they were.

At last the soldiers in front reported that the Turks were coming, and Peter soon saw a great army of two hundred thousand fierce Moslems in front of his little force, which counted up only thirty-eight thousand men. Seeing the odds against him he gave the order to retreat, and the army began its backward march. As it neared the river Pruth a new danger showed itself. The advance-guard brought word that a great force of savage Crim Tartars held the other bank of the river, completely cutting off Peter's retreat.

The state of things seemed hopeless. With two hundred thousand Turks on one side, and a strong force of Crim Tartars holding a river on the other, Peter's little army was completely hemmed in. There was no water in the camp, and when the soldiers went to the river for it, the Tartars on the other shore kept up a fierce fight with them. A great horde of Turkish cavalry tried hard to cut off the supply entirely by pushing themselves between Peter's camp and the river, but the Russians managed to keep them back by hard fighting, and to keep a road open to the river.

Peter knew now that unless help should come to him in some shape, and that very quickly, he must lose not only his army, but his empire also, for if the Turks should take him prisoner, it was certain that his many enemies would soon conquer Russia, and divide the country among themselves. He saw no chance of help coming, but he made up his mind to fight as long as he could. He formed his men in a hollow square, with the women in the middle, and faced his enemies.

The Turks flung themselves in great masses upon his lines, trying to crush the little force of Russians by mere numbers. But Peter's brave men remembered that Catherine was inside their hollow square, and they stood firmly at their posts, driving back the Turks with frightful slaughter. Again and again and again they fell upon his lines in heavy masses, and again and again and again they were driven back, leaving the field black with their dead.

This could not go on forever, of course, and both sides saw what the end must be. As the Turks had many times more men than Peter, it was plain that they would, at last, win by destroying all the Russians.

For three days and nights the terrible slaughter went on. Peter's men beat back the Turks at every charge, but every hour their line grew thinner. At the end of the third day sixteen thousand of their brave comrades lay dead upon the field, and only twenty-two thousand remained to face the enemy.