Rockets are the future. For civilian scientists, they are the way to the stars, for the military - the way to victory. It took a good time to develop rocketry, but once they were perfected, around WW2, they revealed a whole new horizon for mankind. It turned out rockets have both civilian and military use. The second one is pretty straightforward - relatively small rockets are the next generation, 'smart' weapon to substitute the 'dumb' bombs that, once launched from the tube (or released from the hold of the bomber), will fly according to the laws of ballistics. Now, the rocket can change direction mid-flight...