During the Second World War the 128th Brigade was mobilised in September 1939, soon after the outbreak of war. The brigade continued to serve with the 43rd Division and was preparing to go overseas to the Franco-Belgian border to join the British Expeditionary Force (BEF). The brigade was at the time commanded by Brigadier Frederick Browning, a Regular Army officer of the Grenadier Guards. However, the BEF's retreat and evacuation from Dunkirk during the Battle of France cancelled these plans and the division instead remained in Kent on the defensive and prepared for a potential German invasion of England.