When Huaxia used several days of busy land logistics and transportation lines to cover and unveil the vanguard cannon, the artillery of the Americans seemed to have suddenly become a supporting role.

Far from the coast, except for a dozen old 280-mm fortress guns that could barely cope with the return fire, all other guns stayed below the 203-mm treble range because of the cheap cost of the Americans' mass production.

Factors such as the enemy's artillery fire, rapid counterattacks, and the rise of air power made the artillery of World War II no longer pursue large caliber as vigorously as in World War I.

Of course, different factors considered in terms of tactics, strategy, and even history, politics, and other aspects also make the attitude of various countries towards large-caliber artillery different.

The Germans remained in the confines of a land state, located in the center of Europe, and there was no doubt that large-caliber artillery could tear apart the fortresses of the old European countries around them. As a result, the Germans' large-caliber artillery became larger and larger, and with the help of convenient railway transportation in Europe, the Germans could also use the sharp weapons of train guns.

The Americans also developed many giant cannons, and for the Americans, who developed a 50 times diameter 406 mm naval gun during World War I, the Germans' giant cannon technology was difficult for them.

It's just that they have very few tough bones in the Americas, and most of them are Americans who are going to fight on expeditions, either with thick naval guns or with new types of aerial bombardment. Land artillery of a large caliber is rarely used.

Not to mention the troubles of the independent development and production of the giant cannon itself, spare parts and special ammunition, etc., it is not suitable for the needs of large-scale production. Even the logistical troubles after the service are enough to discourage the Americans.

After the appearance of long-range bombers obscured the brilliance of the huge artillery's strategic mobility, range superiority, and great power, the Americans did not hesitate to abandon the large-caliber land artillery with a series of shortcomings, such as poor tactical mobility, poor logistics maintenance and support, and huge cost. The maximum caliber of land artillery in service with the army generally remained at 203 mm.

Except for the small 914-mm Davy mortar, which hit the battlefield with soy sauce, more large-caliber land cannons just stayed on the test ground.

However, in this life, China's vanguard cannon aroused the arrogance of the Americans.

Not only did they compete with the Chinese people in tanks and planes, but even the giant artillery also formulated a secret plan, preparing to defeat the edge of the Chinese pioneer cannon.

"It's time for our Tom to show his face!" The Americans were not alarmed by the appearance of the Vanguard cannon on the front line, they had already received the news that the Vanguard cannon in Alaska was moving south. Even they were more eagerly looking forward to the arrival of Huaxia's vanguard cannon. The myth of the Vanguard Cannon can be shattered with their own cannon.

From the continental United States to southern Canada. The railroad system went unimpeded, and three of the Americans' first Tom cannon in service went straight to the North Saskatchewan front. Four days after the roar of the three-stage 420mm Vanguard cannon overwhelmed almost all American artillery, the towering Tom cannon began to wield its might.

"Boom!" "Boom!"

The battle between the two cannons was like a battle for the divine position of Thor, and the roar of the battle spread throughout the land.

The other cannons seemed to be a foil, and the weak cannon sound was like a trembling moan, and like a hesitant whisper, waiting for the final victory between the two land kings.

In order to hide people's eyes. Also for rapid construction, only 420 mm three-stage guns were deployed on the North Saskatchewan River front.

And the Americans also relied on the foundation of developing naval guns and used a mature 16-inch 406 mm caliber.

If the muzzle diameter is not large, it must be powerful.

The double diameter also determines the initial velocity of the shell and the final kinetic energy of the muzzle shell.

The Americans, who have already learned some of the capabilities of the Huaxia three-stage cannon, are confident that they will be superior.

"The Americans also have a cannon?" Meng Xiang was just surprised, and then couldn't help laughing. "It's a pity that you chose the wrong opponent!"

The Americans' opponent this time is not Huaxia, but the Red Alert base, which has made the best choice based on a lot of time and space.

In some planes, land artillery has reached the pinnacle of development.

When the Pioneer Cannon was upgraded to level four, beyond the level of the base at this time, Meng Xiang still had doubts, but when he learned that the level of the Pioneer Cannon was not limited to level five, he also understood. Why the Germans in World War II have already climbed to the caliber of 800 mm. And the fourth-level Vanguard cannon is only the reason for the 500 mm.

Even the clones are following a merit level that is not limited to level five, rather than a standard level equivalent to the base level.

After breaking through the limit of the end date of World War II. The Vanguard Cannon can easily break through to level four, and even reach a higher level after accumulating enough military merit.

However, Meng Xiang didn't need to be so ostentatious, and he didn't even upgrade all the 5 giant cannons on the front line, only upgraded the 2 that fought against the American Tom cannon.

The giant cannon duel is so simple, Huaxia's fourth-level pioneer cannon overwhelms poor Tom without any suspense.

The two sides beat each other more than a dozen times, and the 3 huge guns of the Americans softened 2.

If it weren't for the fact that the five vanguard cannons in China were scattered very widely, I am afraid that the last giant cannon of the Americans would have become a pile of waste garbage.

But Rao is like this, just listening to the roaring declaration of the five pioneer cannons that keep roaring, anyone can see that the Chinese who only lightly injured one won this battle.

"We have a better cannon, we will definitely be able to defeat the Huaxia people!" Mike Alister, who personally presided over the actual combat test, stood on the ruins of a Tom's cannon in front of him, regardless of the danger, and couldn't help but be indignant when he looked at the distorted barrel.

Little Davy was not yet born, and he led his team to the study of Tom's cannon.

Relying on the experience of naval artillery, the Americans initially chose 406 mm, but they also had a 20-inch 508 mm giant gun planned. It's just that the 20-inch cannon is just beginning to be equipped on the new generation of Washington-class battleships, and the data on sea tests are incomplete, let alone land development to solve more problems.

The Americans could not wait for the new cannon to fight the Vanguard cannon, and as soon as they got the news of the destruction of the Tom cannon, they implemented a preparatory plan.

Under the cover of many fighter jets, 18 large bombers from the United States carrying the American version of the T-10 bombshell were dispatched en masse, and even the British sent 6 Lancaster bombers carrying the original cabinet bombs to help.

If it is near the Chinese mainland, Rao is escorted by more than 100 fighters, and these bomber groups of the Allied forces also need to be cautious and cautious in this sortie. But this is Canada, and it is the Chinese who need to be supported from a distance. And the several airfields occupied by the surrounding Chinese troops simply could not meet the take-off and landing of a large number of Chinese fighters.

Besides, these days, Huaxia's jet fighters and the Americans have been fighting for air supremacy overhead, and although the Americans have lost more than 800 planes, there are also a lot of damage to Huaxia fighters.

Although I don't know how many Chinese fighters there are on the front line, judging by the number of soaring in the sky, there will not be many of them. What's more, for this bombing mission, the Americans also organized a small-scale all-front air battle, and more than 1,000 more than 1,000 planes attracted the attention of Huaxia jet fighters on various fronts.

Add to this the escort of fighters, including 50 Sabres, and the Americans thought they were already foolproof.

But when they flew over the Vanguard cannon, they realized that they had underestimated the anti-aircraft firepower of the Huaxia.

The high-velocity Getter cannon can shoot down jet fighters, while the large-caliber alert cannon can directly threaten bomber groups at an altitude of 10,000 meters.

"Damn, which bastard said the mission was easy this time?" Lieutenant Colonel David cursed as he stared at the towering barrel behind the smoke that was blooming all around him.

In the daytime, the huge figure of the vanguard cannon is so conspicuous that it can't be hidden.

After realizing that the Chinese night fighters were more formidable, many of the Americans' bombing was changed to daytime. While this may face more threats from ground-based anti-aircraft artillery, it at least weakens the night interception of Huaxia fighters.

It's just that the Americans didn't expect that the Chinese army that came from the expedition would be equipped with so much anti-aircraft firepower, which made the American bomber formation very embarrassed for a while.

Even with the proximity fuse, the hit rate of anti-aircraft artillery is very low, if it were not for the tall cabinet and T-10 These giant bombs each need to be very expensive to manufacture by hand, more precious, and need to accurately hit the vanguard cannon covered with a thick shell in order to pose a threat to it, I am afraid that the bomber group would have thrown it directly at high altitude.

But even with the dense anti-aircraft fire, it was still unable to completely block the rapid surprise attack of the American aircraft group.

"Just get closer, and we'll start throwing!" David instructed his men.

Perhaps the Americans also took into account the unexpected situation, and this time among the bombers, 3 B-36s specifically carried 2 T-12 Cloud Makers.

The world's largest bomb, more than 19 tons, is enough to destroy any target, even if the distance of the attack point is slightly offset.

"Boom!" The towering barrel of a vanguard cannon poured down in a mushroom cloud.

"Good, well done!" David excitedly clapped his hands with his companions in celebration, "Let's kill the next target!" ”

Before he could determine the exact location of his next target, his B-36 was targeted.

The situation was urgent, Huaxia's emergency plan was activated, and after Meng Xiang's nod, the Patriot anti-aircraft missile made its debut.

"Dangerous!" The rapid cries of the reconnaissance planes did not make the bombers react in the face of the rapidly approaching missiles.

"Boom! Rumble! Rumble! "In front of the sonic boom cloud, balls of fire burst into the air. (To be continued.) )