
Link through to larger image for more detail.
The Campaign:
First of all, a little background. My main object here is not the rapid fall of China. Secondly, my object is not to have "phoney war". The object is to conquer China as expeditiously as possible while at the same time
spending little to no resources on the campaign. In fact I want to build industry in preparation for the wider war soon to take place, and if I am to build units, I want those units to be units that will have value down the road.
I can spare little for the upcoming campaign against China, because I will be playing against human USA and England, and as a small country I have to make every bit of production count so that I can match their powerful navies in the future.
The first thing I do is lay on 8 serials of 2 industry. I also want to have some Light Cruisers in serial because I really want to be pumping these out by the time I am at war with the Allies. Its important to note that most of the naval ranges for the East is Red have been reduced, and the most modern ships are requred for long distance maneuvers at the distance of Pearl Harbour. I don't want my navy to be hindered in any way.
When the 2-26 incident happens, I go with "crush this coup", even though it is clearly better to "Listen to their Demands", but I am a "historical" kind of guy, so....
As well I rush tech some mountain troops, and for a change I also start a long serial of CAS -- Usually I skip this tech tree and go for long range tactical bombers and Navs. The rest is all industry basically, except for the Soryu carrier which was in the build queue at start.

Link through to larger image for more detail.
By 1937, I have done next to no upgrading, and pulled in all my garrisons from the Islands, and used what logistics generals to save on supplies. My energy deal with Germany (Koontz) ensures that I will have energy to spare when the resources come harder when I am at war. I will upgrade later, when the bonus for upgrading through generations will cut my upgrade costs in half. When I have 1939 Infantry, I will upgrade my army to 1936 and stop upgrade, when I have 1941 infantry I will upgrade again to 1939, and stop upgrade.
At no time will I produce any more infantry. Every single bit of IC must be conserved for the production of specialized units such as Marines, ships and planes.
Since my army is entirely made up of 1918 infantry, and I built no new ones, I will be using my garrisons as an important part of my attack plan for China. They are to be the flank guards of my army in quite sectors.
The only units I have upgraded are my cavalry, which I keep under Crown Prince Higashiguni, who for some reason I can't explain got auto-promoted to Field Martial, over the usual choice which is General Hata. Higashiguni is good enough, though, so I am hardly crying the blues, nor am I in any real hurry, but he and the Mongolian cavalry corps will play a fundamental part in this campaign.
My overall object in the first phase of the war is to use the surprise attack to gain ground while the Chinese are disorganized and before the regular troops arrive to support the second grade Shanxi troops. I definitely want to to get myself down to the Yanghtze river and cross it before winter comes, as I know that a blockade here in December can seriously hamper my advance.
The Battle for Shanxi
First up: get Daytong. This province will be a pain in the ass if properly fortified, so I aim for a two pincer envelopment of Bejing, where I hope to surround my first lot of Chinese troops, and take Daytong while I am at it.
Higashiguni's cavalry is so fast he actually manages to cut himself off as he speeds forward while giving me another angle of attack on Daytong, which gives me the extra "envelopment" bonus. More cavalry is also advancing on Anyang on the north side of the Yangze as well.
Even though my main force is all 1918 infantry, my superior doctrine makes the Japanese Imperial Army an unstoppable steamroller. I make my first months objective easily against the weak Shanxi troops. My main fleet assets are brought up in force to provide shore bombardment up and down each coastal province. Sugiyama is detailed with extending the front to Yucheng. Once taken, I use transports to dump
16 garrisons I had waiting at Dalian, to ensure that no Chinese counter attacks will succeed, while I mop up in Beijing -- these garrisons will be here for a long while, releasing my mobile troops for other operations.
I have made sure the Major-General Kawabe, and the few other engineering leaders I have are given commands, not so much for the purpose of this episode of crossing the Yhangtze, but because they need the practice because there will be many more rivers to cross in the future.
At the end of it all at least 100,000 Chinese troops have been surrendered or killed in the opening phase of the campaign.
The Battle for the Shandong Peninsula
By now I have 5 angles of attack on Daytong, and the defenders are easily routed. We can also see how transporting garrisons are used to bulk up forces along the coast. I try to force Sugiyama's corps across the Yangzhe and into Jinan, but fail. This never works, but I always try.
Daytong dealt with, Higashiguni's cavalry corps runs the mountain chain all along the border with the communist Chinese, supported by units in the foothills to the east, each mountain province falls like dominoes to these multi-pronged attacks. By October I am across the Yhangtze and in the clear, literally since the snows will not fall a lot south of this point.
Here we can see how I have brought up garrisons to fortify the mountain provinces against potential counter attacks. 6 in each of these mountain strongholds is sufficient.
Higashiguni's cavalry have made a full sweep on my right flank coming through the mountains, over the Yhangtze and onward into central China. He continues to play a vital role in keeping the enemy off balance by extending the right flank of my inward seabound hook that intends help isolate and destroy yet more Chinese forces in a pocket in the Shandong peninsula. A single landing force made up of 4 mountain troops completes the pocket by landing at Lianyungang. Garrisons are quickly added at the beachhead to ensure the army is not dislodged.
Notice that China also has garrisons on the coast. These are EIR additions designed to bulk up China's coastal defences and make the campaign that much harder for a human player.
The IJN plays a role here, creating a naval blockade that ensures the speedy capture of the Chinese divisions cut off at Shandong.
In the end another 200,000 Chinese troops are eliminated from the Chinese order of battle, and it is basically all over for China. She simply will not be able to replace the 30 divisions she has lost in the opening phase of the war.
From now on, it is just a hard slog forward, but eventual victory is assured. A few more encirclements using attacks from land and by sea, one at Shanghai, and some more down the coast at Guangzhou and elsewhere are all part of the process of bringing China into the Japanese sphere of influence. But that is in 1938 and 1939, and by then carrier production is in full swing, because the war for the rest of Asia awaits.