Transvaal Province

The Transvaal is a historical region and former Province of South Africa, located North of the Vaal River, that existed from 1910 to 1994. It's now part of the Provinces of: 'Gauteng; Limpopo; Mpumalanga and North West'. The Limpopo River marked its border with Botswana and Zimbabwe to the North, while the Vaal River marked its boundary with Orange Free State Province, to the South. It was bounded by Mozambique and Swaziland (now Eswantini) to the East and by Cape Province to the West. 
The name "Transvaal" means "beyond the Vaal" in Afrikaans, referring to its location North of the Vaal River. 
The region was initially inhabited by various Bantu-speaking peoples, and later saw the migration of Afrikaners who established the South African Republic (also known as the Transvaal Republic) in 1852. 
The region was annexed by the British in 1877, but a Boer rebellion restored it in 1881. Following the Second Boer War (1899-1902). The South African Republic became the Transvaal Colony under British rule. In 1910, it became the Transvaal Province within the Union of South Africa (later the Republic of South Africa). The Transvaal Province was dissolved in 1994 after the end of apartheid, and its territory was divided into the Provinces of: 'Gauteng; Limpopo; Mpumalanga and part of North West'. 
Today, the name "Transvaal" is still used to refer to the historical geographical area, and is commonly used to describe the region which is  extremely rich in mineral and agricultural resources. 
The Witwatersrand, South Africa's most important industrial area, is located on the Southern edge of the Highveld, in the Transvaal Province!
The Transvaal gold fields resulted from gold discoveries during the 19th Century.