The 1744 pact between Muhammad bin Saud and Muhammad ibn ʿAbd al-Wahhab marked the emergence of the first Saudi state, the Emirate of Diriyah. By offering the Al Saud a clearly defined religious mission, the alliance provided the ideological impetus to Saudi expansion. First conquering Najd, Saud's forces expanded the Salafi influence to most of the present-day territory of Saudi Arabia, eradicating various popular practices they viewed as akin to polytheism and propagating the doctrines of ʿAbd al-Wahhab.