Yemen

In ancient times, Yemen was the home of the Sabaeans, a trading state that included parts of modern-day Ethiopia and Eritrea. In 275 CE, later the Jewish-influenced Himyarite Kingdom. Christianity arrived in the fourth century. Islam spread quickly in the seventh century and Yemenite troops were crucial in the early Islamic conquests.

With its long sea border between eastern and western civilizations, Yemen has long existed at a crossroads of cultures with a strategic location in terms of trade on the west of the Arabian Peninsula. Large settlements for their era existed in the mountains of northern Yemen as early as 5000 BCE.

The flora of Yemen is a mixture of the tropical African, Sudanian plant geographical region and the Saharo-Arabian region.

Yemen contains six terrestrial ecoregions: Arabian Peninsula coastal fog desert, Socotra Island xeric shrublands, Southwestern Arabian foothills savanna, Southwestern Arabian montane woodlands, Arabian Desert, and Red Sea Nubo-Sindian tropical desert and semi-desert.