okay hope chickenhead is reading this. the logic in the game is that buildings are attacked during raids only. that means the same horde of monsters will attack the base as well as other areas in the city. again, since its the same time, the units you dispatch from the base is busy fighting with the field teams. thats why they cant defend the base at the moment. (its not magic) here is a gaming tip. do not send field missions during raid days. keep them on base defences and continue the next day. (1up for the msg)