A little farther on we halted for a few hours' sleep, and at ten minutes to three we found ourselves again on the move. We marched all that day through a large and dense forest. Now and again we were surprised by occasional artillery shots at the more open sections, but the trees helped a great deal in protecting us from the enemy's airplanes, and proved a hindrance to their tactics. But with the cavalry it was a different matter. Uhlans harassed us every hour of the day. We had only about two machine guns to a battalion, and they were worked so steadily and so hard that they repeatedly jammed. Once we were almost cut off. A party of Uhlans came clattering down on our heels driving the rear guard in on the support, and for a few moments there was what approached a modern barrage fire of artillery on the road in our front. Luckily for us, the artillery fire slackened for some reason and we got ahead before the Uhlans could envelop us. Later in the day I was serving in the rear guard. Suddenly we heard the roaring of a motor. We took cover at the sides of the road. Our "point"--was in the rear, and, if there was anything wrong, we knew they would inform us. The roaring of the motor grew louder. We were so tired that our nerves jangled. I had never felt so jumpy. There it came around the bend with a Red Cross flag flying from it, but it was not one of our ambulances. It had great, heavy, double wheels and there were Red Crosses painted on its sides in addition to the flag flying from the front. Our impression was that it had gone off its course. The chauffeur had released the muffler cut-out and the engine was running very quietly now. A man sitting beside the driver and leaning far out over the side was yelling in broken English that they were lost, and he gesticulated toward the body of the car in such a way as to make us think that he had badly wounded men with him. We began scrambling back onto the road. Our war was not against the wounded and suffering, so we would let them pass. Suddenly the ambulance stopped; the sides of it quickly rose; machine guns showed their ugly muzzles. "Br-r-r-r-r t-t-t," they began to sputter. I leaped backward and fell headlong into the ditch. Everybody was jumping for cover. The bullets lashed the road and ricocheted far upon it. Scarcely a man of us was hit, but we were in wild confusion. I cannot describe the scene. No one seemed to think of putting his rifle to his shoulder. The horror of it--the passionate anger against such vile trickery--drove us into a rage; but--for the moment--it was an impotent rage. We seemed to be at their mercy. Then the platoon commander's voice rose above the rat-a-tat of the machine guns: "Steady, men! Fire at will, but pick your men carefully."