22nd May 1939
The Italian Foreign Minister Count Ciano and the German Foreign Minister von Ribbentrop sign a ten-year political and military alliance between the two countries, which will be dubbed 'The Pact of Steel'. It guarantees support for each other in the event of war.
This causes the British to re-evaluate the defence of Egypt and the Canal zone. This had been slowly built up since the scare over the Italian invasion of Abyssinia, but needs elsewhere had limited this. Contingency plans are put into action to bring in reinforcements.
1st June 1939 - The new Nuffield Tank
Given that the A13 Scimitar was the Nuffield Organisations first foray into designing a tank, they felt they'd done a pretty good job. However it now seemed that the rapid changes in tank design would be better served by a new design, based on the successful parts of the A13, would be a better way forward. They'd also learnt from Vickers to treat Ministry Specifications more as guidelines than rules.
The big difference was the engine. There had been a lot of heating issues with the Liberty engine, as well as the issue of its cost, and for this tank a new engine had been provided for, a new flat 12 of over 300hp. If that didn't work out, the Liberty could be used with fairly minor modifications. The VVSS Horstman suspension had proven to work very well on the A13 - so well in fact it was being copied by Vickers for their next heavy tanks - and while the transmission and mechanicals had needed changing, it has been possible to base much of them on the A13, which had made a big reduction in the time needed to get the prototype working.
The tank was the first designed in Britain that exceeded the recommended track gauge for the railways, at 9'3" wide. This had been found necessary to fit the engine and its cooling system in - the engine was flat, which was good (it meant a lower tank profile), but also wide. As it was by now obvious that these tanks would be travelling around the Continental railway system, with its more generous width restriction, this had been accepted by the Army. While it would require checking before shipping them around Britain, in practice there weren't many bottlenecks that would affect it, and any that were an issue could be handled by routing accordingly.
The width had also allowed a wide turret ring. Vickers had built their two current models with a 60" turret ring, to allow both the 6/18pdr close support weapon, and if needed a larger high velocity gun. While the Nuffield engineers had their own ideas about the shape and layout of the turret, it had been decided to copy this. They could actually have made it slightly wider, but a common diameter seemed a sensible thing. The prototype mounted the HV3pdr, but they pointed out it could also take the 6/18pdr if the Army wanted a close support version. There had been a suggestion that a narrower ring could be used, and shape the turret to allow more space, but in the end a simpler shape was used. This way they could fit the preferred 5 man crew into the tank. The changes from the old A13 turret were fairly small, the most obvious being the extra room of the wider turret, aided by using the new mechanical elevation control, pushing the gun further forward.
The biggest change from the A13 was the weight. The Army had actually been quite reluctant to suggest a weight, merely saying that the all-up weight should be less than 24 tons to make it easy for the Army's current equipment to handle. The mild steel prototype came in at 21 tons, and they expected the final version to be closer to 22tons. They had used welding - this had been considered for the A13, but time constraints had made them decide on riveted construction for that tank - and that gave them over 4% weight reduction They had increased the size of the fuel tank - the tank could now achieve 180 miles range on the road, better than the current Vickers tanks, and their first trial had clocked it at 25mph on the road and 15 on rough terrain, making it suitable for the cruiser role if needed.
With the changes, particular the all-welded hull, Nuffield had decided to build the tank in a different factory to the A13. They expected to be able to produce 20 tanks a month 9 months after a contract was approved, and could expand into another of their factories if more were needed - the main limitation was the funding. This also let them carry on producing the A13, which was still considered an acceptable tank, one which would be soon equipping the armoured force protecting the Suez Canal.
5th July 1939, MEE Farnborough.
The unit was pleased to see the first of the production A12 Matilda II tanks. They'd evaluated the prototypes, and it seemed to have taken an age for the final version to come off the production line. Normally they'd have gone to the training unit, but after all the delays the Army wanted to be sure everything was all right now. So they'd been sent the first four for a final evaluation before sending them on to the training unit, but so far everything looked good. It certainly looked the part, it just seemed a shame these had taken so long to get to them.