William Joseph Slim has been very depressed lately, because Slim has a good ability to resist defeat and recover his troops, and has a determination to win or lose the war; Therefore, in October 1943, because of the arrival of Mountbatten, the Supreme Commander of the Allied Forces in Southeast Asia, he became the commander of the new 11th Army Group, the Eastern Army Group, which formed the ground forces.

However, the Eastern Army was soon renamed the 14th Army, and he himself was soon parachuted into the Middle East by Churchill to counter Guderian's menacing surprise attack.

The reason why Churchill chose him was because he knew that William Joseph Slim's military ability was to be familiar with commanding troops and fighting in desert terrain and open areas, while the opponent's disadvantage was that he did not have much experience in fighting in jungles and rivers, just like fighting with the Japanese army in those forested places in Burma, he did not have much actual combat experience.

Moreover, William Joseph Slim was promoted to major general in June 1941, and was also responsible for commanding the 10th Indian Division in June and July, commanding troops from Iraq to force their way into Syria along the right bank of the Euphrates River, and successfully captured the important bridge over the Euphrates River in the fortified town of Deir Ezzor, so Churchill parachuted him into Iran to face Guderian's ferocious attack.

When he came to Iran and Iraq to accept the appointment, William Joseph Slim was still relatively confident, because as long as Guderian successfully landed in Iraq and seized the major areas there, Slim could use the desert area of Iraq to find a way to defeat Guderian's troops who were rushing forward.

In particular, Guderian's armored and tank units, including mechanized ones.

Moreover, if Guderian really implements the tactics of aggressive assault, then with the distant and fragile logistics supply lines of the German army, there is simply no ability and means to provide a large number of weapons, equipment, military materials and other items needed for the war to support Guderian's security side to occupy Iraq.

Since it is possible that the German army will not be able to fully occupy Iraq, then Iran will have no way to be invaded by the German army under the command of Guderian.

Moreover, Iraq and Iran have now deployed a large number of British, American, and Soviet troops, so William Joseph Slim is still full of confidence and confidence when he arrives to accept the battle.

Of course, this was just wishful thinking on the part of William Joseph Slim, because what he never dreamed of was that Guderian's troops not only had the most advanced individual armament, but also the most advanced tanks, armored vehicles, mechanized troops, and strong support from the sea and air.

For this reason, a few days after the battle began, William Joseph Slim suddenly realized that the situation he was facing was much more dangerous and weaker than the battles with the Japanese in Burma and India.

So when he was ready to repair Guderian's iron army with great vigour, he found that he was powerless at all, and the British army he was able to command was still the same as in the days before his arrival, which had been beaten by the Germans and looked for teeth everywhere.

Moreover, the saddest thing is that not only is he unable to keep Iraq's large airports and oil fields, but even Iraq's air and sea supremacy are gradually being lost.

In other words, William Joseph Slim's appearance did not immediately resist Guderian's ferocious attack.