I always thought Milka was from Germany or Switzerland. Originally, it was indeed Swiss, founded in 1901. However, the brand was acquired by Kraft Foods in 1990 and later became part of Mondelez International in 2012, a U.S.-based company.
Mandolez aquired Freia in Norway a few years back and switched out the chocolate they used. One of the things they ruined was the traditional «kvikklunsj» - was just overall sad :(