From 1966 to 1989 The South African Defense Force (SADF) fought a war on the border between Angola and South West Africa (today known as Namibia). This 23 year conflict is today referred to as the Forgotten War.
The 'Kaplyn' (cutline) was a thin strip of land cleared of any growth. This was the border.
During this period every single white South African son was forced, through the Conscript System, to serve at first, one, then later two years as soon as they left school. A total of 715 South African Soldiers gave their lives to protect their country.