In October 1928, the M1928 was demonstrated at Fort Myer, Virginia. There the Army's Chief of Staff, General Charles P. Summerall, and other high-ranking officers were impressed and strongly recommend that the Infantry Tank Board conduct further, official tests of the new vehicle. However, the Tank Board was less than impressed. They pointed out that the vehicle's armor was very thin and could not survive penetration by the smallest armor-piercing antitank rifle or artillery piece. The Board also differed with Christie on guidelines for tank capabilities, which were based on a radically different theory of armored warfare than that adhered to by Christie. While Christie advocated the use of lightweight tanks with long range and high speed, designed to penetrate enemy lines and attack their infrastructure and logistics capabilities, they saw the tank as simply a supporting weapon to facilitate breakthroughs by the infantry, and help isolate and reduce enemy strongpoints near the front lines, much as they had been used in the previous world war. For the Infantry Tank Board, armor and firepower were far more important design criteria than mobility, and the M1928 prototype was passed to the Cavalry for further evaluation.