The expeditionary force began to dominate Southeast Asia by recruiting defeated soldiers

After finishing the tasks of recruiting new soldiers and digging for gold, Zhang Chi finally had the opportunity to study the War Thunder system.

After several amphibious raids against the Japanese, he estimated that the Japanese army had probably already deployed their "new tanks"—a modified version of the Type 97 medium tank equipped with a 47mm rapid-fire gun—to deal with him. (Picture)

This Type 0 medium tank, with its updated gun, still had difficulty penetrating the 63mm sloped armor on the front of the Sherman M4 at zero distance.

However, it could easily destroy an LVT-A1 amphibious tank with only 12mm of armor at a distance of 1500m. (According to records on the Eastern Front, 1500m was almost the maximum distance for tank engagements on plains.)

Fortunately, he still had a newly formed tank company using the six Matilda II infantry tanks left behind by the John people. The 47mm rapid-fire gun of the Type 6 modified had a chance to penetrate the 75mm vertical frontal armor of these old heavily armored tanks only at an extremely close distance of 100m.

On the contrary, the 40mm small water tube of Matilda II has a penetration depth of 77mm at a distance of 500m when using the IXB type APCBC armor-piercing projectile, and even at a distance of 1500m it has a penetration depth of 57mm, which is enough to penetrate the 25mm frontal armor of the Type 97 modified at a long distance.

"However, these tanks alone are not enough. I need to spend some time on research and development to upgrade the tank troops." He thought silently and opened the system interface.

Unexpectedly, this time, the changes in the system interface surprised Zhang Chi.

It turns out that in the battle after the last attack on the airport, not only the [M2A2 Light Tank] had been unlocked, but even the subsequent [M8 Self-Propelled Artillery] had been developed.

What surprised him even more was that after developing the [M8 Self-Propelled Artillery], there were nearly 400 additional points of excess research and development value.

"System, why was the profit from the last battle so high?" Zhang Chi scratched his head while flipping through the previous kill prompt records.

Previously, because the system's kill benefit prompts during combat were too dazzling, Zhang Chi simply checked the option to no longer be reminded, so he didn't know why he had obtained so much research and development benefits.

At this time, the system responded:

[Since the host has over 3250 troops under their command, it is determined that the host has a regimental-level force. Therefore, the system has unlocked the regimental-level profit mechanism. The host will receive 150% profit if they personally operate the vehicle, and 10% profit if their troops operate the vehicle.]

"3250 people? Isn't that the number of people assigned to Hans' 1936 Infantry Regiment?" Zhang Chi, a WWII military enthusiast, keenly noticed this detail. "So your system is still a German one?"

After Zhang Chi finished complaining, he continued to look through the records and found that it was indeed true.

[Host kills 1 [Non-commissioned Officer], R&D points increase by 75, Silver Lion coins increase by 150.]

This profit is indeed 1.5 times higher than the previous 50 research and development and 100 silver lions for killing a Japanese sergeant.

[The host's LVT-A1 tank killed 1 [Non-commissioned Officer], increasing R&D points by 5 and Silver Lions by 10.]

Zhang Chi frowned as he looked at the number of R&D personnel. The kill rate of his tanks was indeed small, but in the battle at the airport, Zhang Chi had dispatched 24 LVT-A1s.

In addition to the kills by the main Mallards 1-4, the Japanese soldiers killed by the coaxial machine guns and tail machine guns on the other tanks also gained benefits.

Zhang Chi did a rough calculation and found that the gains from the kills of the vehicles under his command accumulated over time were quite significant. No wonder it even met the 4000 research and development points required for the [M8 Self-Propelled Artillery].

Suddenly, a record caught Zhang Chi's attention.

[Host destroyed 1 [Ki-43 Nakajima Fighter], R&D points increased by 600, Silver Lions increased by 1550. ]

Zhang Chi suddenly remembered that he was bored at the airport and fired a shot at a burning Japanese plane on the runway.

"There's profit in using a tank to destroy the enemy's parked planes?" Zhang Chi said with regret. "I should have fired more shots earlier. There were dozens of planes. If I bombarded them one by one, it would cost tens of thousands of dollars in research and development."

"Forget it, forget it. In a war, completing the predetermined goals is the most important thing." Zhang Chi comforted himself. After all, the situation on the battlefield changes rapidly. There is no time for him to slowly bombard the Japanese planes one by one.

放下懊悔，张弛分别花费700和2100银狮币各购买了一辆【M2A2轻型坦克】和【M8自行火炮】。

Later, he discovered that after purchasing 6 types of White Eagle I tanks, he had unlocked the research and development rights for White Eagle II tanks.

看着系统内科技树亮起的II级坦克们（图），张弛略微思考后就兴奋地把溢出的400点研发值全都投在了3.0权重【M4A3（105）中型坦克】上。

伴随着张弛的意念点击了确认按钮，科技树面板上边，【M4A3（105）中型坦克】（图）的研发进度变成了[400/9200]。

在战雷游戏中，这款有着63mm正面倾斜装甲，并且换装了105mm榴弹炮的M4A3谢尔曼改型坦克由于没有穿甲弹，只能发射弹道非常弯曲的105mm高爆弹和破甲弹而被安排在了等级很低的3.0权重。

Moreover, this Sherman modification, which focuses on ground support, is still on the self-propelled artillery line, which is just right for Zhang Chi to study directly.

The M4A2 Sherman medium tank, which has the same armor level and a 75mm main gun and was commonly used by the White Eagle Army in history, was assigned a weight of 4.0.

并且在科技树上，这款M4A2前方还有【M4谢尔曼中型坦克】、【M4A1谢尔曼中型坦克】和【M3李中型坦克】三款坦克需要顺序研发，极大拖慢了玩家的研发速度。

However, for Zhang Chi who lives in the real world, the [M4A3 (105) medium tank] equipped with a 105mm howitzer is more suitable for him.

After all, when dealing with the Type 95 light tank that occupies the main position of the Japanese tank regiment, compared with the 75mm armor-piercing shells that may penetrate it, the 105mm high-explosive shells can restore the "bean tank" to its spare parts with one click.

Thinking of this, Zhang Chi couldn't wait to drive the gold vehicle to kill some devils so that he could develop the [M4A3 (105) medium tank] as soon as possible.

Unfortunately, before he could do anything, Bai Minghui broke into his office.