Which country was once known as the happy land?

The country Yemen was once known as the happy land.

Explanation:

Yemen is a country with a lot of likely growth and development.

Yemen is the happy land because it has high rainfall compared to other places of the Arabian peninsula.

The Latin name geographers once gave Yemen was "Arabia Felix". The "Felix" means "rich" and "sufficient" but also "happy" and "wealthy."

So, Arabia Felix means "Happy Land" or "Fortunate Land".

In earlier days Yemen was called as Arabia Felix later in modern days its name changed into Yemen.

Yemen was known as the happy land