Forward went the Allied infantry, driving the now disrupted Huns before them. The fog kept clearing. Presently both Blaine and Bangs saw heavy masses of men advancing in platoon formation over the scraggy battle-scarred plain. They were probably two miles distant from the retreating Huns.
Blaine darted back and sent out his signal flares, announcing the fact. Indicating the probable distance, he waited for the barrage he was sure would come. Bangs, seeing that Lafe was signaling, doused his now useless Boche flares and confirmed what Blaine had signaled. Presently the barrage began, and now both saw that it was incumbent on them to remain up there as long as possible to assist the new Allied assault by rendering their barrage effective.
But Bangs once more perplexed Lafe by another manifestation of his way of fooling the Germans. More and more Blaine was perplexed.
"Where in sin did Buck get read up in Boche code flares like he is now?
I know a thing or two, but he's got me beat to the woodpile this time!"
Bangs, spiraling upward and back towards the Hun front, was sending forth flare after flare that was meaningless to Lafe, yet which was for some purpose. Then suddenly Buck shot off on the side towards Blaine the following words in the code familiar to all Allied spad-pilots.
"Get back! Tell our folks to double their fire, keeping ahead of our advance. Savvy?"
Blaine mutely obeyed. The Allied fire was redoubled as per instructions. Buck, by this time far to the east, could now be seen making back towards the Allied front where Blaine was zigzagging to and fro waiting for what might come. Suddenly, behind Bangs, he saw the speck-like dots of Teuton planes emerging into the upper air and rapidly approaching. At the same time other planes in the west appeared, biplanes, scouts, and one or more heavy battle planes. Evidently the cards were being laid for a squadron air battle unless something else intervened. Instinctively Lafe thought of his ammunition roll. He was well supplied at starting on this trip, and had transferred his own remaining stock to Finzer's plane when abandoning his own. But the most of it had already been used. It was not likely that Buck was any better prepared in that line. At least they might wait and join their own planes, now coming out of the west.
In the east the hostile squadron came on rapidly. Deploying as they advanced, both Blaine and Bangs could see that there were battle planes, scouts, and heavy bombing machines. These last were sweeping lower, trying to get in range of the advancing Allies.
"Come on! Hurry up!" both aviators kept repeating to their own advancing air fleet. "No time to waste! Let's get at 'em. They're going to bomb our front lines."
Almost immediately a number of fast triplanes forged on ahead of the rest at a speed which a year before would have been deemed impossible. Joining the two weary airmen who had been up all night, yet were still full of the battle hunger, they swept low down and straight at the bombing planes, now beginning to drop their deadly explosives along the lines of advancing infantry. But only for an instant, as it were, did they go uninterrupted.