26-27 May 1940. Calais, France.
The 1st Panzer Division had been reassigned to probe the French and British defences around Gravelines towards Dunkirk. The capture of Calais had been handed to 10th Panzer Division who were finding it hard going. The Vauban fortifications of a by-gone era were giving the modern German attackers grave problems. In addition to the British and French defenders of the port, the Royal Navy and Royal Air Force also contributed to the discomfort of the panzer division in their attempts to capture the town, and the toll to both sides grew.
For the German troops this was a very different experience of war from what they had experienced over the previous fifteen days. They had gotten used to war at the gallop, and now they were involved in a slog, where the panzer was almost useless. It was the blood and sweat of artillery, engineers and infantry that had to be used to evict men from prepared and interconnected defences. The casualties mounted, and another group of German soldiers learned to hate the pom-pom-pom that came from the British infantry tanks.
In the early afternoon in Berlin, the OKH was informed by General Von Rundstedt that he was prepared to recommence the offensive by the von Kleist and Hoff groups. The response was issued later that day, ‘The Fuhrer has authorised the left wing to be moved within artillery range of Dunkirk in order to cut off, from the land side, the continuous flow of transport (evacuations and arrivals).’ At 08:00hrs on 27 May the two German panzer groups resumed their attack, three days and eight hours after they had been halted.
NB Text in italic differs from OTL. OTL Calais fell on 26 May, here it is still holding out, while the infantry tanks of 8th Bn RTR will help much more than the cruisers and lights of 3 RTR, with only one Brigade of infantry Calais will fall in roughly the same way that it did OTL, but again, with higher German casualties.