Combat Casey #12 (1953)

Trying to escape enemy lines, Combat Casey and Penny Pennington are attacked by Chinese soldiers but easily dispatch them. In order to try and sneak out of enemy territory the pair dress up in Chinese military uniforms and use Penny's proficiency in Chinese to sneak through. However, fighting off another group of enemy soldiers who uncover their disguises they come across a massive tank being built. Spying on the commanding officer's speech they learn that the massive tank is intended to be used to roll over American lines, and then later used to invade the United States and the rest of the United Nations. Sneaking in for a closer look the two decide to return to base to report their discovery when one of the Chinese troops orders them to pilot the massive tank. They comply, but while inside the massive tank, Combat and Penny reveal themselves and knock out the entire crew. They then take control of the tank and use it to crush the enemy troops and base, bailing out while piloting the massive tank into the enemy ammunition dump, destroying it in a massive explosion.