It is said he gave victory to the religion of Allah after it had long been oppressed. He crushed stone by the mere sound of his voice. He is the conqueror of the Holy land. The successor of Moses who carried on his legacy was the mighty warrior Joshua Ibn Noon.
According the the narrations, Joshua will return with the Qaim:
Imam al Sadiq (as) said: “Al-Qaim pbuh will come forth from the back of Kufa with twenty seven persons, fifteen from them are from the people of Musa (Moses) (as), who guided to the truth and acted according to Justice, and seven are from the people of the Cave and Joshua ibn Nun, and Salman and Abu Dujana Ansari and Meqdad and Malik al-Ahstar are present too, who will become Ansar and Rulers between the hands of the Qaim (as).”
– Al-Irshad by Shaykh Mufid v2 p386
He has returned in this day and age to support the Mahdi, and is one of the planets of the second Mahdi Aba Al-Sadiq