How did Saudi Arabia become a kingdom?
When King Abdul-Azziz unified the land, the name 'Kingdom of Saudi Arabia' was given.
Saudi Arabia was never colonized, so it has always been independent. The modern Kingdom of Saudi Arabia was founded by the as-Saud Dynasty, which was ruling the Kingdom of Nejd. When Nejd conquered Hejaz, the Sauds decided to rename the unified kingdom as their kingdom, which is where the term "Saudi Arabia" comes from.
Arabia is a piece of land. Saudi Arabia is a country. Since Saudi Arabia occupies over 80% of Arabia, many people use the terms interchangeably even though they are not so. Arabia is still called Arabia, even though its geopolitical divisions have changed often in the last 500 years. As for Saudi Arabia, the story is more interesting. In 1920, the British recognized the Kingdom of Nejd in central Arabia, which was ruled by the…