In order to equip each battalion with a certain amount of heavy firepower, Zhang San specially designed three types of ballistas, the first of which was the smallest battalion-level ballista, which fired heavy objects under five catties with a range of more than 300 steps.

Because of the battalion-level operations, they generally attack the houses and forts of the following towns or some villages, as well as some bandit cottages. Transportation and other tasks can be completed by a squad of just one battalion, and one battalion is equipped with a ballista squad of four ballistae, which is enough to solve the problems faced by the battalion-level units.

The regimental level uses medium-sized ballistas, which can fire ten pounds of weight and 500 steps, and after the weight of the ballista increases, the number of operators also increases accordingly, and a brigade of twelve people can only operate and transport one.

Because a ballista of this size could not be hung behind an ammunition truck like a battalion, it required special animal transportation, and special shells and special crossbow arrows also needed to be transported by a transport vehicle, and the number of personnel operating the winding was increased accordingly.

When fighting alone at the regimental level, it can only deal with some county towns and small-scale battles, and a regiment with a company of ballista troops and twelve ballistae is enough to complete the regimental operation.

In addition to these two, there was also a heavy ballista, which could shoot a weight of twenty pounds to eight hundred paces, and one of the twenty-five soldiers operated one, five of a company, and twenty-five of a battalion.

Considering the need to attack the city, Zhang San deliberately set up five such heavy artillery battalions, but did not set up a regiment-level intelligent organization, but was directly managed by the General Staff as a strategic force.

Although it was not used in this attack on Yangzhou, there were four heavy artillery battalions on standby on Sea Shark Island, and when Zhang San decided to attack Zhenjiang, these four heavy artillery battalions were immediately transferred.

One hundred heavy guns plus two hundred and forty medium ballistae of twenty regiments. As the main weapon of this siege, of course, there were no twenty regiments to fight Zhenjiang, in fact, Zhang San only ordered Yang Tai to lead eight regiments to be responsible for this campaign.

Gan Xingtai took six marine regiments to take Jiangyin and Jingjiang, this place is very important, to say that the Great Song Dynasty wanted to block the Yangtze River and trap the Ryukyu Army in Yangzhou, the most ideal location is Jiangyin, the narrowest part of the Jiangyin River is only 1,200 meters, only a few bed crossbows and a few catapults on both sides of the river can block the entire river.

This is also Zhang San's inspiration to others with fire, there is a way that you do the fifteenth year of the first year, although the Great Song Dynasty has not made a ballista now, but the bed crossbow and trebuchet can also fire oil bombs, and Zhang San's boat is also afraid of fire.

Now there are 30,000 defenders in Yangzhou City, everyone is busy reinforcing the city defense, and it is expected that after half a month, the army of the imperial court will arrive, so Zhang San needs to be fully prepared, and boats of grenades, hand-held fire oil bombs, ballistas, various cannonballs, bed crossbows, and other unique weapons of the Ryukyus are placed on the city wall.

Anyway, Zhang San's tactics are to try to block the enemy below the city wall, and not give the enemy a chance to climb the city wall, as for the weapon, Zhang San is really not afraid of this consumption, and the ore used to make gunpowder is all slaves, and the cost is very low.

Even Zhang San found a stable supply channel for oil and discovered an open-pit oil field in central Luzon, Zhang San didn't know what reserves or anything like that, but it was enough for war.

After listening to the sound of artillery for two days, Yang Tai finally brought the news of Zhenjiang's breakthrough, and his own casualties were less than 1,000 people, Zhang San was very satisfied, and immediately ordered him to leave 10,000 people to defend Zhenjiang, and then ordered Yang Tai to lead his troops to attack Changzhou, leave 10,000 people in Changzhou to defend, and join forces with Gan Xingtai to march into Suzhou.

On the other side, Zhang San ordered the navy to take Hangzhou from Hangzhou Bay, and Zhang San was ready to play a big one and empty the Yangtze River Delta! As long as Yangzhou can resist the pressure of the Song army, then Zhang San can rely on the Yangtze River and the southern section of the canal to hold the Yangtze River Delta.

Zhang San felt that he could grab at least three million people from these places! Five days later, Yang Tai broke through Changzhou, and then left 10,000 troops and then began to set off for Suzhou, and drove to Suzhou with 15,000 troops from Gan Xingtai in the Wuxi area.

When the Great Song Dynasty forbidden army arrived at the city of Yangzhou, Zhang San finally received the news of the capture of Suzhou, and immediately ordered Yang Tai to lead 15,000 people back to Yangzhou to participate in the defense, leaving 20,000 people to participate in the clearance of counties and towns in Suzhou.

This is also the reason why Zhang San did not dare to start a large-scale war with the Great Song Dynasty, Zhang San is now only 120,000 people in the army and marines, and this time only 100,000 were mobilized in the Yangzhou campaign, and after the rear cities were occupied, the remaining troops in Zhang San's hands were less than 40,000.

Hangzhou was to draw a part of the crew from the navy to form a temporary battalion in order to complete the attack, and now Zhang San has wiped out all the forces of the Ryukyus, and the training of the first batch of 30,000 recruits is expected to be completed in another month.

The recruits who have just completed their training can only be used as guard troops, but it is good to be able to replace some troops, so Zhang San needs to use the 35,000 men in his hand to defend for a month before there will be reinforcements.

In addition to the original merchant ships in the Ryukyus, the Hangzhou Bay operation also got a lot of good ships, but unfortunately there were not enough crews.

However, Gongsun Sheng is already solving this matter, and the solution is very simple, all sailors who have families on Zhoushan Island this time can join the maritime troops, not only can their families be resettled to Ryukyu Island first, but also can share two more acres of paddy fields.

As soon as this policy came out, there were 50 more sailors in the Ryukyus, mixing the old and new personnel, and the pressure on shipping was immediately relieved a lot, and every day I saw that the powerful people of the Ryukyus were willing to join the Ryukyu fleet, and there were more and more ships that could be used, and the current fleet of ships had exceeded 500.

Now their main figure is to transport the people stranded on Zhoushan Island to Ryukyu Island, and then digest these people, and there is the plundering of the population of the newly occupied area, and the people stranded in Zhoushan not only cannot bring help to Zhang San, but also consume food.

Moreover, if they are still on the island, it is inevitable that after a long time, they will have such and such thoughts, so that they will simply settle some of them in the Ryukyus first, so that those people will not have other ideas after the flow of people and the division of land and land.

This kind of resettlement is divided into two categories, the first is that all kinds of technicians and their families will be given priority to be resettled, and the second type is those pure farmers who can only grow will be sent to the Tainan area for intensive study and training for a period of time.

As long as these people are willing to join the Ryukyu Army or the Ryukyu Logistics Department, they will be given priority placement, and there will be placement rewards, Zhang San hopes that tens of thousands of new troops can be recruited from such a group of people to solve the current personnel dilemma.

And in order to appease people's hearts, Zhang San reduced the tax on the whole island by 10%, so that the old people will not be dissatisfied when they see the treatment of the new people, and the new people can also see the benefits and speed up their integration.