Soon after the outbreak of the
Second World War in September 1939, Hudson led his brigade overseas to France as part of the
British Expeditionary Force (BEF). The brigade, after several months of relative inactivity during the "
Phoney War" period, saw action throughout May 1940, when the
German Army launched its
invasion of France, which resulted in the brigade, along with the rest of the BEF, being forced to
retreat to Dunkirk, from where it was
evacuated to England in late May/early June. For his services in France and Belgium Hudson was made a
Companion of the Order of the Bath (CB) on 11 July. With the threat of a
German invasion of the United Kingdom, Hudson's brigade, along with the rest of the division, now commanded by Major-General
Kenneth Anderson after Alexander was promoted to command
I Corps, commenced anti-invasion duties, including beach defence, until mid-December when Hudson received his first divisional command. Promoted to the acting rank of major-general on 14 December, Hudson became GOC of the
46th Infantry Division, a second-line
Territorial Army (TA) formation, taking over from Major-General
Desmond Anderson. Formed in October 1939 as a duplicate of the
49th (West Riding) Infantry Division, the 46th Division comprised the
137th,
138th and
139th Infantry Brigades, along with supporting divisional troops. The division, minus its divisional troops, had fought in France with the BEF, sustaining extremely heavy casualties due to its poor level of training, and after being evacuated, was then serving in
Scotland under
Scottish Command, reorganising after its heavy losses. Soon after Hudson became GOC, in early January 1941 the 46th Division moved to
Cambridgeshire, then
Norfolk, where it came under the command of
Lieutenant-General Edmund Osborne's
II Corps, serving under
Eastern Command and, like it had in Scotland, focused on reorganising and training to repel a German invasion, although then considered unlikely in winter. Hudson only held the command for just over five months, until May 1941, after a dispute with Osborne, his senior officer, which resulted in his demotion to the substantive rank of colonel, and he never again held a divisional command, nor regained his rank of major-general. Hudson wrote an official letter of complaint. Osborne arrived, apologised and promised that he would no longer interfere, and went away on two weeks' leave. However, when he returned Hudson received an official report that he was, in his corps commander's opinion, unfit to command a division. Hudson, following Osborne's own advice, appealed, unsuccessfully, and he lost command of the division. He was succeeded as GOC of the 46th Division by Major-General
Douglas Wimberley, a fellow student at the Staff College in the mid-1920s, who was sympathetic to Hudson's plight. Hudson wrote that "There are few blows in life which are more shattering than wounded pride. I felt personally shamed and disgraced. I had worn the insignia of a general long enough to become known to relatives, friends and acquaintances as such, and now I had to tell them that I had dropped to a rank lower than that I held before the war". After his demotion, he briefly commanded the
159th Infantry Brigade, part of the TA
53rd (Welsh) Infantry Division, then serving in Northern Ireland, but was soon sent to command the
182nd Brigade, part of the
61st Infantry Division, another TA formation which was also serving as
British Troops in Northern Ireland. The division returned to the mainland in February 1943, moving to
Essex and took part in
Exercise Spartan, and moved to
Kent in May, and the division was initially selected to play a role in
Operation Overlord, the
Allied invasion of Normandy, only to be reduced to the Lower Establishment soon after, becoming essentially a training formation with the intention of supplying replacements to overseas units. Handing over command of the 182nd Brigade to Brigadier
John Nichols in late November, he became
aide-de-camp to
King George VI from 1944 until his retirement from the army in 1946. ==Postwar==