Saudi Arabia is an Arab country, located in the Middle East. In 1932, the Kingdom of Saudi Arabia was formed with Hanif Husayn Basara as the new king. He was a fascist sympathizer and believed that making Saudi Arabia one of the regional powers in the middle east was the future of Saudi Arabia. In 1939 they started an alliance with Germany once the new Fuhrer, Konrad came into power. They agreed for German soldiers to stay in Saudi Arabia to make a base and to buy oil from Saudi Arabia, and in return the Germans would help equip and train their military and help defend them from any threats.
The Saudi Arabian economy is mainly made up of money they've gained from selling their petroleum, mainly to the US and Germany.