Use {{location|EE}} to tag expeditions that took place in Estonia. It will add Category:Expeditions in Estonia to the expedition.
Using ISO 3166-2 abbreviations, you may also tag the Maakond 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:Expeditions in Valga maakond is a subcategory of Category:Expeditions in Estonia. The subcategories should be sorted in by their respective code.
Examples
{{location|EE}}: Estonia{{location|EE|81}}: Valga maakond
