The Muslim soldier who introduced Islam into Tripoli was
Answer Details
The Muslim soldier who introduced Islam into Tripoli, which is now in modern-day Libya, was 'Uqbah b. Nāfī.
'Uqbah b. Nāfī was a companion of the Prophet Muhammad and was appointed by him as the governor of the region of Ifriqiya, which included modern-day Tunisia, Algeria, and Libya. 'Uqbah b. Nāfī was tasked with spreading the message of Islam in the region and he successfully did so, including in the city of Tripoli.
Therefore, 'Uqbah b. Nāfī is regarded as the person who introduced Islam into Tripoli.