Use {{location|BE}} to tag expeditions that took place in Belgium. It will add Category:Meetup in Belgium to the expedition.
Using ISO 3166-2 abbreviations, you may also tag the province that the expedition took place in.
If the category link appears red, do not worry and create the category. Make sure that it is included in the appropriate parent category, for instance, Category:Meetup in Bruxelles is a subcategory of Category:Meetup in Belgium. The subcategories should be sorted in by their respective code.
Examples
{{location|BE}}: Belgium{{location|BE|BRU}}: Bruxelles{{location|BE|VOV}}: Oost-Vlaanderen{{location|BE|WBR}}: Brabant wallon
