So now, Shen Mo has occupied the Helan line in Datong, Yanshan and laid out two indestructible lines of defense.

It also gives him the advantage of military quality, the strength of weapons and equipment, and the first move to defend dangerous passes.

Temujin has huge human resources, and the number of troops is close to ten times that of Shen Mo.

At the same time, his army, which was unprecedented in history, also has extremely terrifying mobile and war advantages.

What's more, Temujin was like a god of war in the hearts of the grassland soldiers, which made the Mongolian army not afraid of the Song Dynasty psychologically.

This army has no moral character or morality. As long as they win the war, they will use all the means they can imagine.

So now both sides are evenly matched, how should that grassland hero Temujin break the deadlock?

...Just as Yanshan defense line was ready, Temujin's army was in the north was not clear.

At this moment, in the upper reaches of the Liao River further north of the Thunder Fortress, a fleet was struggling to move upstream.

This fleet consists of six flat-bottomed inland steamers. The hull of this ship was not large, and the six ships were not fully loaded, so the draft was very shallow.

They were driven by the steam engine and were about to reach the source of the Liaohe River.

At this time, the amount of water in the river channel was not much, and the depth of the water was not enough to support the fleet.

At this time, the commander-in-chief of the fleet, Tang Tianji, saw that the detection hammer was thrown into the water.

The marching ships had to go around for a while and repeatedly explored in the riverbed before they could advance for a while. He decisively stopped the fleet from traveling west.

Afterwards, Tang Tianji ordered the fleet to dock and unload the cargo personnel on the ship together.

The fleet that unloaded the cargo suddenly increased by about half a foot because of the reduced load.

The fleet immediately returned to the estuary at full speed under the order of Tang Tianji.

Then Tang Tianji, with fifty soldiers and dozens of large wooden boxes of equipment, began to get busy on the river beach.

Their action this time was really extremely risky! First of all, the mouth of the Liao River was actually an enemy-occupied area in name, and it was the territory of the Great Liao Kingdom's land.

Once there is a problem with the ship here, Lu Wuyu, who is following Temujin's southern expedition, cannot provide any support.

At the same time, after he sailed all the way to the upper reaches of the Liao River, he arrived at the hinterland of the Mongolian grassland.

At this time, more than one million Mongolian troops had already passed by here and rushed towards the Thunder Fortress in the south.

If Tang Tianji and others encounter enemy scouts here, they will immediately fall into a siege! The six steamships that originally planned to use artillery to provide cover for them after they landed, were decisively sent back by Tang Tianji because of insufficient water in the Liaohe River.

This made their 50-person team immediately become an unprotected state of naked among the wolves.

But at this moment, Tang Tianji had no fear on his face.

This young white fat man from that time has now become a strong young man.

It can also be seen from the light emitted from his eyes that this guy has a fierce and ruthless spirit in his heart.

They spent a whole morning organizing equipment, assembling machinery and carrying supplies, and finally preparing to set off.

By the time the sun was slightly west, twenty-four huge hot air balloons had already begun to swell out of flames from the nozzle, and gradually swelled.

The hot air balloon unit is also ready for battle.

Now the hot air balloon troops led by Tang Tianji are no longer the same as before.

The hot air balloons can now be called soft frameless airships.

Because its airbag is like an obese swimming fish, it has a streamlined shape thick in the middle and thin at both ends.

In addition, twenty-four gasoline engine-driven propellers can enable hot air balloons to adjust their course in the air.

Although they cannot sail against the wind and can only maneuver with a range along the wind direction, this is much stronger than the hot air balloons that drift with the wind at the beginning.

These gasoline engines have actually been in the form of a precursor, but they are still not mass-produced today, and the reasons here are very complicated.

First of all, the gasoline engine is still in the early stages of development, and neither horsepower nor failure rate can reach the level of a war horse.

Therefore, even if it is installed on a vehicle, it can only walk on a flat ground, which is not of practical significance.

Then there is Mobei in this era, where there is no official road at all, let alone highways.

Therefore, vehicles with insufficient horsepower cannot advance in depth on the grassland.

Tang Tianji's twenty-four gasoline engines were created by him, An Jun and Sister Mu Tianxuan from the General Equipment Department.

Even the high-purity gasoline used in the engine is used in a fine chemical factory and specially made small cooking products for them.

Therefore, this hot air balloon unit is the entire elite of the Song Dynasty Air Force.

As long as one is lost, it cannot be produced in three liang.

The reason why Shen Mo had to use so much effort to build this army was because this time Tang Tianji was carrying an extremely important task!...The autumn is now clear and the grass is withered and yellow. Tang Tianji came to the rear of the Mongolian army with the help of the steamboat.

He wanted to burn the grasslands with the strong northwest wind! The code name of this action is "Prairie Fire", which is crucial to the impact of the situation.

Because once the Mongolians on the Yanshan defense line were defeated and began to retreat on a large scale, the Mongolian army's action would be so fast that it would give Shen Mo a headache.

So as long as Tang Tianji is at the source of the Liaohe River and within hundreds of miles of the Thunder Fortress, he burns a large area of ​​grassland.

It will make all the war horses on the retreat of the Mongolian army without grass to eat.

By that time, let’s see if the war horses can still be hungry and run through the overfire grasslands that are several miles wide! This time, the arson operation, due to the strong northwest wind in early winter, will not spread to the grasslands further north.

The Mongolian women and children on the grassland faced desperate situations due to lack of grass and death of livestock.

So this time it was just an action against the Mongolian invaders, not an indiscriminate extinction attack.

Tang Tianji and more than 50 people and twenty-four hot air balloons carried out this "Prairie Fire" operation.

The effect it plays is likely to be even greater than that of tens of thousands of troops!... Seeing that the hot air balloons have begun to inflate, their troops have finally passed the most dangerous period.

At this moment, Tang Tianji breathed a sigh of relief and immediately ordered all the hot air troops to board the boat and set off.

This time they will use the strong northwest wind to fly from northwest to southeast.

On this oblique route, they will constantly throw incendiary bombs on the grassland, turning the place they have walked into a line of fire.

After this, the northwest wind will naturally cause the line of fire to gradually move southeastward.
Chapter completed!