Sweden has a long history of camouflage design, dating back to the 1940s. The earliest patterns were primarily intended to cover vehicles and artillery pieces, although the shelter quarter was also in use, mostly likely influenced by German designs. Nevertheless, the standard combat uniform of the Swedish Armed Forces remained plain forest green until the very late 1980s. Although several camouflage designs were introduced for trials, in the 1950s, 1960s, and 1970s, none were ever officially adopted. It was only in 1990 that the M90 splinter camouflage pattern was finally introduced, a design that remains in use today.