Kingdom of Yemen

The oldest Yemeni nation in Arabia is the nation of Saba. Its heyday dates back to the eleventh century BC.
(1) Kadur before 650 BC: In this period, the title of the kings of Saba was Makrab Saba. Their base was Takht-e-Sarah, the ruins of which are still found one day west of Ma'rib. And are known as Kariba. It was during this period that the famous Marib Dam was founded, which is of great importance in the history of Yemen. During this period, the kingdom of Saba flourished to such an extent that it established colonies in various places inside and outside Arabia.
(2) Period from 650 BC to 115 BC: During this period, the kings of Saba abandoned the word Makrab and adopted the title Malik (Badshah). And instead of Sarah, he made Marib his capital. The ruins of this city are still found 20 miles east of Safa.
(3) From 115 BC to 300 BC. Then Reesan's name was changed to Zafar. The ruins of which are still found today on a hill near Shehryarim,
This was the period in which the decline of the nation of Saba began. The first Nabataeans established their power over the northern Hijaz and drove Sabaku out of their colonies. The Romans then occupied Egypt, Syria, and the northern Hejaz, disrupting their trade routes, and their trade was gradually destroyed. The Qahtani tribes, on the other hand, were at loggerheads with each other. As a result of these circumstances, the Qahtani tribes left their homeland and moved to other parts of the country.
(4) From 300 to the beginning of Islam Kadur: During this period, there was constant unrest in Yemen. Revolutions came, civil wars broke out, and foreign nations had the opportunity to invade. At one point, Yemen's independence was taken away. Thus, it was during this period that the Romans established military domination over Aden, and with their help, the Abyssinians occupied Yemen for the first time in 340 AD, which lasted until 378 AD. After that, the independence of Yemen was restored but the famous barricades of the Arabs began to break. Will break even at 50 450 or 1 451. And the great flood which has been mentioned in the Holy Qur'an (Surah Saba) under the name of Sail-e-Aram. As a result, the settlements were deserted and many tribes were scattered here and there.
Then, in 523 AD, the Jewish king of Yemen, Zunawas, launched a horrific attack on the Christians of Najran and tried to force them to leave the Christian religion. The Qur'an refers to this horrific event in the verses of Surah Al-Burooj (قُتِلَ اَصٗخَابُ الٗا ُٗخٗدُوٗد, etc.). As a result of this incident, Christianity, under the leadership of the Zoroastrian kings, was already active in non-Arab conquests and expansionism, seeking revenge. The Abyssinians, under the influence of the Romans, recaptured Yemen in 525 A.D. with 70,000 troops under Ariat's captivity. Agreed
This is the same Abrahah who tried to destroy the Kaaba and brought a few elephants besides Lashkar-e-Jarrar to carry out the massacre, due to which this army became known as the Companions of the Elephant. Raising the banner of rebellion against the Abyssinians, he expelled the Abyssinians from the country in the captivity of Ma'ad Yakrab, the son of Saif Dhi Yazan Humairah. And as an independent and sovereign nation, he chose Ma'dikrab as his king. This incident took place in 575 AD.
After independence, Medicare stopped some Abyssinians for their service and royal adornment, but this hobby proved to be costly.
On the other hand, Khasra took advantage of this situation by appointing a Persian-born governor of Safa and making Yemen a province of Persia. Since then, successive Persian governors have been appointed to Yemen, until the last governor, Ba'adan, converted to Islam in 678 AD.

Reference:
Al-Rahiq Al-Makhtum