Dunkirk Evacuation On 26 May 1940 Tennant was appointed Senior Naval Officer ashore at
Dunkirk, and ordered to Dover, where he took command of a naval party of eight officers and 160 men. Tennant's party was dispatched on board the destroyer to aid in
the evacuation of more than 300,000 British and French troops left stranded when France fell to the Nazis. The ordinary sailors under his command took to calling him "Dunkirk Joe". Tennant and
Repulse joined Admiral
Sir Tom Phillips'
Force Z, sent to Singapore to counter Japanese advancement in the Pacific, in December 1941. On 8 December, the day after Pearl Harbor, Singapore came under attack by Japanese air units, and Force Z departed for Malaya to attack a Japanese convoy, an operation that was cancelled shortly thereafter. Upon returning to Singapore, they received word of Japanese landings on Malaya, and Force Z - without air cover - made for Malaya to counter them. On 10 December, the Japanese attacked Force Z. Tennant ably handled
Repulse and dodged nineteen torpedoes dropped from Japanese aircraft, while also shooting down several attackers. Nonetheless,
Repulse eventually succumbed to a pincer attack and was hit by five torpedoes, sinking within twenty minutes, with great loss of life. The survivors, including Tennant, were rescued by the destroyers and . On 6 February 1942, Tennant was promoted to rear-admiral and in February 1943 received a
mention in despatches for his part in the
Battle of Madagascar.
Normandy , July 1944 In June 1944, Tennant was placed in charge of the naval side of the transport, assembly and setup of the two
Mulberry harbours that provided port facilities for the coming
invasion of Normandy. ==Post-war service==