OPO meaning in Regional ?

The Ovamboland People's Organization (OPO) was a nationalist organization that existed between 1959 and 1960 in South West Africa (now present day Namibia). The aim of the organization was to end the South African colonial administration, and the placement of South West Africa under the United Nations Trusteeship system. Andimba Toivo ya Toivo had founded its predecessor, the Ovamboland People's Congress, in 1957 in Cape Town, South Africa. In 1959, Sam Nujoma and Jacob Kuhangua established the Ovamboland People's Organization (OPO) at the Old Location in Windhoek. Sam Nujoma was the president of OPO until its transformation into the South West Africa People's Organization (SWAPO) a year later and remained president until Namibia gained independence in 1990.