If the Marine Corps Schools ever enlarges its varied curriculum to include “The Defense of a Dike,” Captain Barrow’s tactical disposition on the night of 21–22 September 1950 can be taken as a unique precedent. Able Company’s commander chose to defend a 100-yard stretch of the levee just north of the intersection. Here the macadam road ran about 25 feet above ground level, and the incline on either side sloped gently. The Marines staggered their foxholes alongside, some high on the slope, others low. Machine guns and BARs were emplaced along the shoulders at the top, so that automatic fire could be directed in volume in any direction. Since all of their ammunition had been fired during the afternoon counterattacks, the 60mm mortar crews laid aside their tubes and went into the line as infantry.[359] [359] _Ibid._ Company A’s perimeter for the night thus had the shape of a long sausage, with the 3d Platoon in an arc at the northern end, the 1st defending the west side, and the 2d in position on the east. From their foxholes on the top and sides of the levee, the Marines commanded the sand spit, the road on the dike, Yongdungpo’s eastern exits, and the vital intersection with the Inchon-Seoul Highway. Fortunately, they had dug their holes deep. At dusk came the telltale rattling, revving, and clanking from the direction of 2/1’s front; and five unescorted T-34s loomed on the Inchon-Seoul Highway, headed toward the intersection. They turned left just short of the crossroads and proceeded in column along a street that paralleled Company A’s dike. The Marines on the levee crouched low in their holes. Cruising majestically like a file of battleships, the tank column cut loose with a hail of machine-gun fire and salvoes of 85mm shells at a range of 30 yards. Able Company’s rocket gunners, whose total experience with the 3.5-inch launcher was limited to the firing of a few practice rounds, popped up from their holes and let fly. One of the tanks exploded in a convulsion of flame and smoke, its turret twisted askew as though some giant hand had torn the steel cap from the body. The other four tanks continued to the end of the perimeter, then reversed course past the Marine line a second time, pumping a steady stream of steel into the western slope of the dike. Reaching their starting point at the Inchon-Seoul Highway, they turned back and made another round trip, with Marine rocket fire damaging two more vehicles and sending them limping off the field. The remaining pair, upon completing the second circuit, again reversed course and made a final pass--the fifth--on the Marine lines. Clearing the perimeter, they rumbled into town and disappeared. [Illustration: DIKE DEFENSE--COMPANY A, 1st MARINES YONGDUNG-PO--NIGHT OF 21–22 SEP]