Then part of the Kingdom of Sabaʾ, the area of modern-day Yemen was called Arabia Felix (Latin for 'Fertile Arabia' or 'Fortunate Arabia') by the Romans, reflecting its perceived prosperity. The success of the Sabaeans was based on their cultivation and trade of valuable spices and aromatics, including frankincense and myrrh. Irrigation of these crops was enabled by the Great Dam of Ma'rib. Strabo mentions that Ilasaros was the ruler of Hadhramaut at that time.