Are there military records available?
How do you know the militia for Zuid Holland?

The following website would be your best bet in my opinion.

http://www.defensie.nl/english/nimh/genealogy/genealogical_r...

The above website explains the situation regarding military records for certain time periods as well as provide links/further contact details for more information pertaining to certain time periods.

Hope this helps :)

Thank you so very much for that information.