Generally speaking, the artillery used by the army has a much longer barrel life than the navy's naval guns, but it is also limited, and some artillery units that frequently fight will lose their barrel life after continuous combat.

And this time the Battle of Jingzhou is expected to be a series of battles, definitely not the Battle of Mihe and the Battle of Jingshi will be over, but to control the entire Jingzhou, and then along the Jinghe River to Pingnanzhou.

Expect more than two mega-campaigns, and more for medium-sized campaigns.

The most important thing is that if nothing else, these battles will be concentrated in three months!

In order to avoid the artillery units of the troops, fighting and fighting, some of the early service artillery barrel life expired, or there were any quality problems, the Ordnance Department simply replaced the artillery of some of the troops scheduled to participate in the war in the past few months, and the original second-hand goods were reserved for the second-line troops or the troops that did not participate in the Jingzhou Campaign, and replaced the newly produced artillery.

In particular, the artillery units of the Third Army almost replaced the artillery that was in service in the early days.

Because this unit will be the predetermined core and main force, this attack on Jingzhou will largely depend on the play of the Third Army and the Second Cavalry Army.

As for the other troops, their overall combat effectiveness in all aspects is somewhat inferior, and they can fight in a fight, but they should not be overly hopeful.

The guns are all brand new, not to mention the large amount of ammunition that has been hoarded.

After all, whether it is weapons or ammunition, it is difficult to replenish them in a short period of time once they are fought.

Even in the months that followed, the arsenal continued to produce ammunition and deliver it to the front, but it took time to produce and transport it.

So the front-line troops must stock up on a sufficient amount of ammunition in advance!

That is the fundamental reason why the logistics department prepares so much ammunition in advance.

Once the fight starts, even if there is still an arsenal with huge production capacity in the rear, there is no way to produce and transport ammunition to the front line in a short period of time, it will take time.

In this Jingzhou Campaign, although the mobilization of troops, strategy and strategy were one of the main actions, in fact, in the past few months, most of the work of the Daheng Unification Army was still on the supply of ammunition.

In the past six months, the Daheng unified army as a whole did not break out any large-scale battles, except for the Fourth Army into Ningyu Prefecture, the First Army into Zhongluozhou in continuous operations, other troops are actually in rest most of the time, occasionally the troops on the northern front will also fight with the enemy, but the duration is relatively short.

For most of the troops of the Daheng Unification Army in recent months, they are in the stage of rest and replenishment, and many officers and men have even been given a short period of leave.

However, this is limited to the soldiers of the combat units!

In the past few months, the logistics department, whether it is Qiu Honglin, the head of the logistics department, or the ordinary soldiers of the logistics department at the bottom, they are all very busy!

Qiu Honglin even connected and traveled between the southern states to coordinate and organize logistics and transportation work.

This is exhausting and tiring, and it is the many ammunition that are sent to the front line.

Of course, there is actually another institution that is also very busy, and that is the former Defense Production Committee, and now the War Production Committee, which coordinates the distribution of production in the major factories, ensures the supply of materials, and so on.

In the past few months, in fact, the Daheng Unification Army seems to have made no big moves, but in fact, it has been busy, just waiting for a large-scale Northern Expedition.

And now, it's about time!

On the day of the Northern Expedition Operational Conference, that is, on May 15, Lin Ziran officially approved the Northern Expedition operational plan.

This was followed by a number of formal operational orders at the front.

Including the 10th Army and the 11th Army in the rear, the order requiring these two armies to guard the rear and strictly prevent the two southern countries from moving.

There were also orders sent to the First Army of Zhongluo Prefecture, the Second Army of Quyang Prefecture, and the Fifth Army of Zisheng Prefecture to carry out strategic defense.

Finally, and more importantly, the operational orders issued to the units scheduled to participate in the Gyeongju Campaign.

At the same time, in order to coordinate the Jingzhou Campaign, command more than 200,000 troops, and coordinate the naval fleet, Lin Ziran set up the Jingzhou Campaign Headquarters and assigned Liang Chenglei, the former commander of the Fourth Army, who was a close confidant, to serve as the commander-in-chief of the Jingzhou Campaign.

At the same time, elite officers and cadres were transferred from the General Staff Department, the Military Affairs Department, and the Logistics Department within the Army Command, as well as from the Third Army's Seventh Army, which were originally stationed in Dongdingzhou, to form various subordinate organs under the command of the Jingzhou Campaign.

The Jingzhou Campaign Headquarters, this is the first time that Lin Ziran has set up a command organization similar to the size of the corps, so he is very cautious, and does not say that the corps will be established directly, but adopts a command center with an obvious temporary nature.

If things go well, then this Jingzhou Campaign Headquarters will slowly be transformed into the first corps of the Daheng Unification Army, and if it doesn't go well, then it will be automatically revoked after the end of the Jingzhou Campaign.

This is Lin Ziran's perception that the scale of the troops is getting bigger and bigger, there are more and more army-level troops, and it is impossible for him to say that he can really go to the front line to personally command at every turn, so it is necessary to set up a command structure similar to the corps-level.

However, considering the issue of military power control, as well as many other influences, Lin Ziran was very cautious on this issue, and did not directly set up a corps, but tried it by setting up the Jingzhou Battle Command.

In the tradition of the Daheng Empire, if the army goes up, it should set up a 'legion', and the 'legion' in the Daheng tradition is not a fixed formation, but more similar to a war zone, and is solely responsible for a certain war zone, a certain front, or even a certain war!

Therefore, the establishment of each army corps is also different, and it may have more than one army under its jurisdiction, and it may even directly administer multiple divisions or brigades, and the troops under its jurisdiction may be tens of thousands, but it may also be more than 100,000 or even more than 200,000.

But once this legion is established, then it will not be easy to change in the future, because in the last few hundred years of Daheng, a certain legion can be regarded as a fixed number, but the troops under its jurisdiction will change.

The real temporary number is generally a certain headquarters, headquarters and the like.

For example, during the Hengao War, the Great Heng Empire set up the Southern Expeditionary Army Headquarters, which was fully responsible for the army war on the Southern Continent.

At the same time, it was based in the two southern states of the homeland, plus the southern vassal kingdoms of Tanor and Kasi as the defense areas, and set up the Southern Front Command, and also set up the Western Front Command and the Eastern Front Command, which were three major defenses, with the back as the main headquarters.

However, these four commands only existed for a short period of about three years before they were abolished one after another.

However, the thirteen legions and the Black Sword Corps that have been established in the Great Heng Empire have never revoked the names of these fourteen legion-level troops, but the troops under their jurisdiction are more or less.

Most of the time, the highest military command unit in the Great Heng Empire was the legion.