The four Army Boys, together with twelve of their company, two squads in all, found themselves detailed to a narrow street, and they soon found that their task was going to prove no sinecure. The street was very narrow, bordered by tall, peaked houses, and every house seemed to shelter two or three riflemen. It was only occasionally that the Americans could see their opponents, but when a German did venture to expose himself for a moment, his slip almost invariably proved fatal, as the American rifles spoke with deadly effect. But the Americans were at a terrible disadvantage, and the sergeant in charge saw this and acted accordingly.

"Break up into groups," he ordered, "part on one side of the street and part on the other, and go from house to house. Clean them out thoroughly, and show no mercy to anybody you find with a rifle in his hand. We'll assemble again at the end of this street."

This plan was put into immediate operation. The four Army Boys were together. With their rifle butts they battered in the doors of houses, then fought their way up to the roofs against the most treacherous opposition. Again and again one or the other escaped death by what seemed a miracle, and they saw to it that the Huns paid the price for these attacks. The second house that they entered was a large one, and seemed a veritable maze of rooms, for each one of which they had to fight to gain possession. As they reached the foot of the stairway leading up to the top story, they saw three burly Germans at the top, rifles in hand, evidently prepared to stop the hated Americans at any cost.

"Surrender!" shouted Frank.

For answer, one of the Germans, who appeared to be the leader, leveled his rifle at Frank's head, but before he could pull the trigger, Bart's big automatic pistol spoke once, and the German swayed, stumbled, and came crashing down the staircase.

"Now's the time, fellows!" yelled Frank, as he saw the remaining two Germans hesitate after the fall of their leader. "Let's get 'em and get 'em quick! Treat them rough!" As he spoke all the boys leaped up the staircase, firing as they mounted.

But before they could reach the top reinforcements arrived for the Huns in the shape of three others of their countrymen. Nothing daunted, the Army Boys rushed on. As they fired one German fell, but the others presented a determined front, although their aim was bad, and so far none of the boys had been seriously wounded, although both Tom and Frank had been grazed by flying bullets. In a few more steps they were among the Germans, and then ensued a fierce hand to hand fight on the narrow landing. The Germans proved themselves no mean antagonists, and for a few minutes there was a wild medley of blows and shouts. The boys fought desperately, and slowly forced their antagonists back against a light balustrade that guarded the stair well.

Suddenly there was a sharp snapping sound, the frail railing gave way, and with wild shouts and oaths the Germans hurtled over the edge for a sheer drop of three stories.

So suddenly did this happen, that the boys had the greatest difficulty in preventing themselves from following, but they recovered in time, and peered over. Three of their late enemies lay still as they had fallen, but the fourth showed some signs of life.

"Whew!" ejaculated Frank, wiping the sweat from his eyes, "we had it hot and heavy here for a time, didn't we?"