 The weapons arrived into Finland during the spring after the war had ended, but they were later used in the Continuation War.However, the guns were soon found to be obsolete in their intended role.Various models of the S-18 series, including the Solothurn S-18/1000 and the Solothurn S-18/1100 were also used by Switzerland, the Kingdom of Hungary, Nazi Germany, the Kingdom of Italy, Kingdom of Romania, and the Netherlands.