Use {{location|CH}} to tag expeditions that took place in Switzerland. It will add Category:Expeditions in Switzerland to the expedition.
Using ISO 3166-2 abbreviations, you may also tag the canton 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 Kanton Bern is a subcategory of Category:Expeditions in Switzerland. The subcategories should be sorted in by their respective code.
Examples
{{location|CH}}: Switzerland{{location|CH|AG}}: Kanton Aargau{{location|CH|FR}}: Canton de Fribourg{{location|CH|TI}}: Cantone Ticino
