With the French Revolution in 1789, and the increasing tensions between Great Britain and Revolutionary France, the Scots Greys were brought up to strength and then expanded with four new troops to nine troops of dragoons, each of 54 men, in 1792 in anticipation of hostilities. Four troops of the Scots Greys were alerted for possible foreign deployment in 1792 and were transported to the continent in 1793 to join the Duke of York's army operating in the low countries. The Scots Greys arrived in time to participate in the siege of Valenciennes and then the unsuccessful siege of Dunkirk.