It seems the militia were just about to arrive Meryton -but not in time for the Meryton Assembly. Ch.7 begins with Kitty and Lydia walking into Meryton to see their aunt and learn of 'the recent arrival of a militia regiment in the neighborhood;'... I guess JA couldn't have the militia arrive too early or there would be sufficient numbers of men at the first dance. JA positions Lizzy sitting down for two dances so she can have Mr Bingley point her out to Darcy and...well you know how it goes!!