On the fall of Ras Al Khaimah, three cruisers were sent to blockade Rams to the North and this, too was found to be deserted and its inhabitants retired to the 'impregnable' hill-top fort of Dhayah.

The British landed a force on 18 December, which fought its way inland through date plantations to Dhayah Fort on the 19th.
There, 398 men and another 400 women and children held out, without sanitation, water or effective cover from the sun, for three days under heavy fire from mortars and 12-pound cannon.

The two 24-pound cannon from HMS Liverpool which had been used to bombard Ras Al Khaimah from the landward side were once again pressed into use and dragged across the plain from the coastal mangrove swamps of Rams, a journey of some three miles.
Each of the guns weighed over two tonnes.
After enduring two hours of sustained fire from the big guns, which breached the fort's walls, the last of the Al Qasimi surrendered at 10.30 on the morning of 22 December.

Many of the people in the fort were herders and farmers who had fled there on the arrival of the British and of the 398 people who surrendered, only 177 were identified as fighting men.
The British flag was briefly flown from the fort before it was blown up.
British losses from the action at Dhayah included one officer and three men killed and sixteen wounded.

The British expeditionary force then blew up the town of Ras Al Khaimah and established a garrison there of 800 sepoys and artillery, before visiting Jazirat Al Hamra, which was found to be deserted.
They went on to destroy the fortifications and larger vessels of Umm Al Qawain, Ajman, Fasht, Sharjah, Abu Hail, and Dubai.
Ten vessels that had taken shelter in Bahrain were also destroyed.
The Royal Navy suffered no casualties during the action.
On the fall of Ras Al Khaimah, three cruisers were sent to blockade Rams to the North and this, too was found to be deserted and its inhabitants retired to the 'impregnable' hill-top fort of Dhayah.
The British landed a force on 18 December, which fought its way inland through date plantations to Dhayah Fort on the 19th. There, 398 men and another 400 women and children held out, without sanitation, water or effective cover from the sun, for three days under heavy fire from mortars and 12-pound cannon.
The two 24-pound cannon from HMS Liverpool which had been used to bombard Ras Al Khaimah from the landward side were once again pressed into use and dragged across the plain from the coastal mangrove swamps of Rams, a journey of some three miles. Each of the guns weighed over two tonnes. After enduring two hours of sustained fire from the big guns, which breached the fort's walls, the last of the Al Qasimi surrendered at 10.30 on the morning of 22 December.
Many of the people in the fort were herders and farmers who had fled there on the arrival of the British and of the 398 people who surrendered, only 177 were identified as fighting men. The British flag was briefly flown from the fort before it was blown up. British losses from the action at Dhayah included one officer and three men killed and sixteen wounded.
The British expeditionary force then blew up the town of Ras Al Khaimah and established a garrison there of 800 sepoys and artillery, before visiting Jazirat Al Hamra, which was found to be deserted. They went on to destroy the fortifications and larger vessels of Umm Al Qawain, Ajman, Fasht, Sharjah, Abu Hail, and Dubai. Ten vessels that had taken shelter in Bahrain were also destroyed. The Royal Navy suffered no casualties during the action.
Persian Gulf campaign of 1819