Caption: Safeguarding Marching Troops On The Roads . Manoeuvres season for the troops has commenced and thousends of soldiers are on the march in Hampshire and Sussex . To safeguard them the rearmost man of the marching line now carries a board on which the words " Danger Troops " is picked out by reflectors , so that they can easily be seen by motorists . Photo shows : A solider with the " Danger " sign on his back marching through Aldershot . 28 Jul 1936