▁were ▁intern ed ▁for ▁the ▁duration ▁of ▁the ▁war . ▁The ▁Belg ian ▁withdraw al ▁was ▁protected ▁by ▁a ▁French ▁Marine ▁brig ade , ▁Belg ian ▁caval ry ▁and ▁the ▁British ▁ 7 th ▁Division ▁around ▁Gh ent . ▁On ▁ 1 5 ▁October , ▁the ▁Belg ian ▁army ▁occupied ▁a ▁def ensive ▁line ▁along ▁the ▁Y ser ▁river ▁in ▁west ▁Fland ers , ▁from ▁D ix m ude ▁to ▁the ▁coast . ▁ ▁First ▁Battle ▁of ▁the ▁Mar ne , ▁ 5 – 1 2 ▁September ▁ ▁J off re ▁used ▁the ▁rail ways ▁which ▁had ▁transport ed ▁French ▁troops ▁to ▁the ▁German ▁front ier ▁to ▁move ▁troops ▁back ▁from ▁Lor raine ▁and ▁Als ace ▁to ▁form ▁a ▁new ▁Six th ▁Army ▁under ▁General ▁Michel - Jose ph ▁Ma un our y ▁with ▁nine ▁divisions ▁and ▁two ▁caval ry ▁divisions . ▁By ▁ 1 0 ▁September ▁twenty ▁divisions ▁and ▁three ▁caval ry ▁divisions ▁had ▁been ▁moved ▁west ▁from ▁the ▁German ▁border ▁to ▁the ▁French ▁centre ▁and ▁left ▁and ▁the ▁balance ▁of ▁force ▁between ▁the ▁German ▁ ▁and ▁the ▁Third , ▁Four th , ▁N inth , ▁Fif th ▁arm ies , ▁the ▁BE F ▁and ▁Six th ▁Army ▁had ▁changed ▁to ▁ ▁Late ▁on ▁ 4 ▁September , ▁J off re ▁ordered ▁the ▁Six th ▁Army ▁to ▁attack ▁east wards ▁over ▁the ▁Our c q ▁towards ▁Ch âteau ▁Th ier ry ▁as ▁the ▁BE F ▁advanced ▁towards ▁Mont mi ra il ▁and ▁the ▁Fif th ▁Army ▁attacked ▁north wards , ▁with ▁its