 Resistance to the occupiers chiefly came in the form of helping Allied airmen escape , and numerous lines were set up to organise this effort ; for instance the Comet line which evacuated an estimated 700 Allied servicemen to Gibraltar . The Comet Line had a series of safe houses throughout Belgium . Allied airmen were given civilian clothes and were frequently moved from house to house , staying with Belgian families who supported the resistance . The resistance would aid the airmen by giving them false papers and guiding them to either neutral or Allied occupied territory . 
