The Kalmar Regiment (Swedish: Kalmar regemente), designations I 20, I 21 and Fo 18, was a Swedish Army infantry regiment that traced its origins back to the 16th century. It was merged with another unit to form a new regiment in 1928. It was later reraised and disbanded again in 1997. The regiment's soldiers were originally recruited from Kalmar County, and it was later garrisoned there. History. The regiment has its origins in fänikor (companies) raised in Kalmar County in the 16th century.
https://en.wikipedia.org/wiki/Kalmar_Regiment