Just before 1745, the strength of the Clan Campbell had been put at a total of 5,000 men. During the Jacobite rising of 1745, the Clan Campbell continued their support for the British Government. They fought against the rebel Jacobites at the Battle of Falkirk (1746) where Government forces were defeated. However, shortly afterwards the Campbells held out during the Siege of Fort William where the Jacobites were defeated. The Campbells were also involved in the Skirmish of Keith around the same time. At the Battle of Culloden in 1746 where the Jacobites were finally defeated, involved in the fighting on the Government side were four companies from the Campbell of Argyll Militia, three companies from Loudon's Highlanders who were under the command of Lieutenant Colonel John Campbell and one company from the 43rd Highlanders who were under the command of Captain Dugald Campbell of Auchrossan.