Corncob-3d!: V3.42  In 1938 aliens swept down out of the skies and began to set up struc- tures.  Allthough many attempts were made to communicate, the aliens did not respond.  It soon became obvious that these creatures simply were not interested in us, or in any other life on the planet.  When human dwellings or sites were in their way, the aliens destroyed them and continued their seemingly random construction plans. So in 1941 the world governments agreed to band together in an alliance for humanity.  No attacks were launched until November 1941.  The plan was a simultaneous all out blitz against the extraterrestrials in every part of the globe. Your mission is critical in this plan.  You must destroy several alien structures, and in the process, many aliens themselves.  If you do not succeed the entire human effort will fail.