Siljan Ring Siljan Ring The Siljan Ring () is a prehistoric impact crater in Dalarna, central Sweden. It is one of the 15 largest known impact craters on Earth and the largest in Europe, with a diameter of about . The impact that created the Siljan Ring occurred when a meteorite collided with the Earth's surface during the Devonian period, about 376.8 ± 1.7 Ma. This coincides around the first Devonian extinction, the Kellwasser Event or Late Frasnian extinction at 376.1 Ma ± 1.6 Ma. The effects of the impact can clearly be seen in the bedrock in the area. The Cambrian,
Siege of Mora country. The Treaty of Versailles in 1919 partitioned the colony between the two powers, creating the new colonies of British Cameroon and French Cameroon. Siege of Mora The Siege of Mora or Siege of Moraberg, between Allied and besieged German troops, took place from August 1914 to February 1916 on and around the Mora mountain in northern Kamerun during the Kamerun Campaign of the First World War. After more than a year of siege German forces on the mountain surrendered, following the escape of many German troops to the neutral Spanish colony of Rio Muni. In early August 1914 the