Thus a legionnaire might parade .
Thus a legionnaire walk out in blue tunic and white trousers in hot weather , blue tunic and red trousers in normal temperatures or wear the blue greatcoat with red trousers under colder conditions .
Thus a legionnaire might parade or walk out in blue tunic and white trousers in hot weather , blue tunic and red trousers in normal temperatures or wear the blue greatcoat with red trousers under colder conditions .