Final answer:
The First Five OG's under the UBN were the four caliphs: Abu Bakr, Umar, Uthman, and Ali. They played a crucial role in the early expansion of Islam and the founding of the Muslim community.
Step-by-step explanation:
The First Five OG's under the UBN were the four caliphs: Abu Bakr, Umar, Uthman, and Ali. They were the founding leaders of the Muslim community after the death of Muhammad. These caliphs ruled between 632 and 661 and played a crucial role in the early expansion of Islam.
They oversaw the conquest of Byzantine and Persian territories and spread the message of Islam throughout the Middle East. Their leadership set the foundation for the establishment and growth of the Ummah.