"Let's get busy," cried Frank, springing to his feet. "I can't wait to get at those barbarians. I hope there's lots of bayonet work today. I never felt in better trim for it."

They fought that day as they had never fought before, for they had never felt so strongly that the world would never be a decent place to live in until their barbarous enemies were humbled to the dust.

The next day the old Thirty-seventh was ordered to take up its position at a bridgehead that it was of the utmost importance should be strongly held. The enemy attacks were converging there, and it was evident that they were planning to cross the river in force. The country behind the American troops was flat and difficult to defend, and if the enemy should make good his crossing the consequences to the Allied cause might prove serious.

The enemy advance had reached the further side of the river, which at that point was about two hundred yards in width. A fierce artillery duel was kept up between the hostile forces. A wooden bridge with stone arches afforded the only means of crossing, and this was swept by such a fierce shell fire from the Allied guns that it did not seem as though anything could live on it for a moment.

As an additional precaution the bridge had been secretly mined by the Allied engineers. Electric wires ran to the concealed charges.

A pressure of a button—and the bridge would be reduced to atoms.

CHAPTER XVIII

A DESPERATE VENTURE

"The Huns will get a surprise party if they try to cross that bridge," remarked Billy with a grin, as the boys were talking over the present situation.