Saudi Invasion of Oman (1806-1808)

Right after unifying the region the Wahhabis engaged a war with Omani empire [1]

Saudi invasion of Oman
Part of Qajar-Wahhabi War

The end of Saudi invasion
Date(1806-1808)
Location
Oman
Result Saudi victory
Territorial
changes
Saudi Recaptured muscat
Belligerents
Omani Empire
Qajar Iran
Emirate of Diriyah *Allied Arabian tribes
Commanders and leaders
Said bin Sultan
Fath-Ali Shah Qajar
Khaled bin saad 
Badr bin sultan al Busaidi 
Abu saeed Amman 

Imam Adulaziz
Saud I

Mutlaq bin Muhammad Al-Mutairi [ar]
Strength
5,000 3,500-6,000
Casualties and losses
3,500-2,000 killed 2,500 killed

After unifying the region and eliminating innovations and polytheism in the area, the Saudis attempted to take Qatar and later tried to capture Bahrain but were successful. They also attempted to take Kuwait but failed. Subsequently, they turned their attention toward Oman, engaging in a war against it. Oman sought assistance from the Qajars, but the Saudis managed to conquer all of Oman, including the fall of Muscat, as well as the current UAE region

  1. The of the first Saudi State book.