In the monster tank that was headquarters the general tapped his fingers on his knees. The pale white light flickered a little as it shone on the board where the bright sparks crawled. White sparks were American tanks. Blue flashes were for enemy tanks sighted and reported, usually in the three-second interval between their identification and the annihilation of the observation-post that had reported them. Red glows showed encounters between American and enemy tanks. There were a dozen red glows visible, with from one to a dozen white sparks hovering about them. It seemed as if the whole front line were about to burst into a glare of red, were about to become one long lane of conflicts in impenetrable obscurity, where metal monsters roared and rumbled and clanked one against the other, bellowing and belching flame and ramming each other savagely, while from them dripped the liquids that made their breath mean death. There were nightmarish conflicts in progress under the blanket of fog, unparalleled save perhaps in the undersea battles between submarines in the previous European war. * * * * * The chief of staff looked up; his face drawn. "General," he said harshly, "it looks like a frontal attack all along our line." The general's cigar had gone out. He was pale, but calm with an iron composure. "Yes," he conceded. "But you forget that blank spot in our line. We do not know what is happening there." "I am not forgetting it. But the enemy outnumbers us two to one--" "I am waiting," said the general, "to hear from those two infantrymen who reported some time ago from a listen-post in the dead area." The chief of staff pointed to the outline formed by the red glows where tanks were battling. "Those fights are keeping up too long!" he said sharply. "General, don't you see, they're driving back our line, but they aren't driving it back as fast as if they were throwing their whole weight on it! If they were making a frontal attack there, they'd wipe out the tanks we have facing them; they'd roll right over them! That's a feint! They're concentrating in the dead space--" "I am waiting," said the general softly, "to hear from those two infantrymen." He looked at the board again and said quietly, "Have the call-signal sent them. They may answer." He struck a match to relight his dead cigar. His fingers barely quivered as they held the match. It might have been excitement--but it might have been foreboding, too. "By the way," he said, holding the match clear, "have our machine-shops and supply-tanks ready to move. Every plane is, of course, ready to take the air on signal. But get the aircraft ground personnel in their traveling tanks immediately." Voices began to murmur orders as the general puffed. He watched the board steadily. "Let me know if anything is heard from these infantrymen...." * * * * *