San Luis Potosí, the headquarters of the U.S. military in Mexico, is also the core area of this defensive line. The U.S. military deployed more than 500,000 troops in San Luis Potosí, and even though the strength was already very strong, it was still far inferior compared to the squadron. After the Battle of Sierra Madre do Sul and the Battle of Central Mexico, the U.S. forces had lost so many forces that they could no longer have an advantage in numbers. What's more, now that the focus of the U.S. Army has shifted to the Rio Grande defense line on the U.S.-Mexico border, there are very few troops that can be dispatched to Mexico. The U.S. military no longer has any hope for the Mexican battlefield. Originally, the United States was prepared to defend itself against the enemy outside the country, but the fiasco again and again made the US government and the military realize the reality, compared with the US Army and the squadron, the gap is too big, and if they are fighting on the mainland, they can occupy more advantages. But fighting in Mexico, even if they have an advantage in strength, I am afraid they will not be able to resist the attack of the squadron. This has led both the U.S. government and the military to place their hopes on the Rio Grande, a plausible stretch of more than 3,000 kilometers that originates in the Rocky Mountains, nearly traverses the North American continent, and finally empties into the Gulf of Mexico.

The wide river surface is a natural line of defense. As long as a few bridges across the river are blown up, it will be more difficult for the squadron to cross the wide Rio Grande than to climb to the sky. In addition, the US Navy is also preparing to send some destroyers and light cruisers into the river to prevent the squadron from crossing the river. The U.S. Army also mobilized heavy forces north of the Rio Grande. As a result, the U.S. government and military have high expectations for the Rio Grande. It's just that it takes a long time to build a defense line of thousands of kilometers, which requires Admiral Davis to lead millions of troops to buy time for the U.S. military. It's just that how long it can last, Admiral Davis is not sure.

San Luis Potosí in the morning is still in peace. Nearby Mexican residents have long since fled to the mountains or the countryside, and the cities are already full of Americans. At 6 o'clock in the morning, a lot of beautiful ** people have already gotten up, they start to wash, and then start to have breakfast. Even though the squadron's intention to launch an attack has become more and more obvious, it has not had much impact on the lives of many US troops except for strengthening their vigilance.

In the foothills of the Sierra Madre Oriental, east of San Luis Poto, there was a regiment of American troops stationed. At 6:40 a.m., most of the officers and men of the regiment got up. After the soldiers had washed up, they began to line up to receive breakfast. Breakfast was not sumptuous, a slice of buttered bread with a glass of milk. Because a large number of young and middle-aged people have joined the military, the industrial and agricultural production of the United States has also been affected to a greater or lesser extent. If it weren't for the development of mechanization in the United States, I am afraid that there would be problems with food supply.

The regiment's defense area is backed by the Sierra Madre Oriental, which is a very safe area. The traffic in the Sierra Madre Oriental was very bad, and it was destined that the squadron would not choose this place as the location for the attack. Therefore, the defensive task of this regiment is also very easy, and if it were not for the fact that the squadron has begun to approach aggressively, these American officers and soldiers would have felt as if they were on vacation in the countryside.

"Buzz!" Suddenly, the sound of a swarm of bees flying sounded above everyone's heads. The U.S. officers and soldiers who were queuing up to receive breakfast all raised their heads in surprise and looked at the sky. They wondered where there would be so many bees in the morning.

What appeared in the eyes of these American officers and soldiers was a large group of black dots, which scattered into several masses and flew towards San Luis Potosi.

"What's that? Migratory birds? But isn't this the time for migratory birds? An American soldier pointed to the sky.

At the gate of the regimental headquarters, the lieutenant colonel had already picked up a telescope to observe the situation in the sky. What appeared in his eyes was not a migratory bird, but an airplane.

"Damn it, those yellow-skinned monkey planes. My God! Hundreds of planes, are these Chinese going to attack us? "The lieutenant colonel was completely shocked by the huge fleet of planes, and the group of planes flying high in the air gave him great pressure.

"Hurry up and send a telegram to San Luis Potosí, more than three hundred Chinese planes are flying towards San Luis Potosí, let them prepare for air defense!" The lieutenant colonel quickly came back to his senses and ordered loudly.

The signal corps hurriedly ran to send a telegram, and the American officers and soldiers who were waiting in line to receive breakfast heard that it was a Chinese plane and immediately fried the pot. Some timid people even scattered and fled, fearing that the Chinese Air Force would attack them. It's just that their appearance seems to be too exaggerated, and the fighters of the Chinese Air Force have no interest in them at all, and they fly away quickly.

In less than ten minutes, the air defense sirens sounded in San Luis Potosí. Immediately after receiving the early warning, the air defense units of San Luis Potosi began to run towards various air defense positions. Many-soldiers didn't even have time to eat breakfast. In central and southern Mexico, it was heavily bombarded by the BF Air Force, which made the US military pay great attention to air defense.

Several field airfields around San Luis Potosi also received information, and a large number of air defense units began to run to positions around the airfield. Ground crews also began to pull the fighter out of the hangar, ready for an emergency takeoff. The pilots were already fully dressed and headed for their respective planes. It's just that at this time, the fleet of the Chinese Air Force has reached the top of their heads.

"Attention squadrons! Start lowering the height. Five minutes later it went to bombing altitude and began to drop bombs! Major Chang Zhining, commander of the 5th Brigade of the 2nd Air Wing of the Chinese Air Force, ordered. The forty HB' Hongyan bombers under his command were about to reach the target and were lowering their altitude. After leaving the Sierra Madre Oriental, the fleet began to reduce altitude. Drop from a height of three thousand meters to a thousand meters, and then start dropping bombs. Each of the HB' Wild Goose, fighter jets, carried 800 kilograms of bombs. Because the target was a fighter jet on an airfield of the US military, the bombs carried were all 50-kilogram aerial bombs. This kind of aerial bomb is enough to destroy a vulnerable warplane.

The fighters of the two squadrons of FB' Haidongqing, which escorted the bombers, had already dispersed and began to attack the US air defense positions around the airfield. and strafing the runways of the US military airfields, destroying those US fighters preparing to take off.

There were also two squadrons of FH5' Falcon and dive bombers that also launched the attack first, and their target was also the air defense positions around the airport, and after destroying these anti-aircraft firepower of the US army, the bombers were able to enter the airfield and drop bombs smoothly.

"Damn, the Chinese plane is coming! Take off now! "Several U.S. Hurricane fighters have pulled up to the runway and are ready to take off. The appearance of the Chinese Air Force put tremendous pressure on the US military. The dozens of warplanes parked at the airfield will be the target of strikes by the Chinese Air Force if they do not take off quickly.

"Da Da Da!" Air defense positions around the airfield were also fired, but in a haste, their firepower appeared very weak and full of holes.

Two FB' Hai Dongqing, fighter jets passed through the US anti-aircraft fire network and opened fire on two US fighter jets that were taxiing on the runway. After a string of bullets was fired, the two U.S. Hurricane fighters that were taxiing were immediately destroyed, and the pilot on top was shot, and the fighter plane, which had lost control, rushed crookedly to the grass next to the runway, and exploded and ignited

"Boom!" An FH5' Falcon, the bomber quickly dived downwards and flew towards an American air defense position, letting out a shrill whistling. At a distance of more than four hundred meters from the ground, aerial bombs were dropped. An aerial bomb weighing 500 kilograms landed accurately on this air defense position, and a dazzling fire erupted. The entire anti-aircraft position was swept away by the flames of the bomb explosion, and several boats of anti-aircraft machine guns deployed here, as well as a light anti-aircraft gun, were destroyed.

In just five minutes, when the fighters of the Chinese Air Force HB'Hongyan entered the bombing altitude, the anti-aircraft fire on the east side of the US airfield had been replaced by FB'Hai Dongqing, fighters and FH5

'Falcon, dive bomber destroys.

From here, a large group of hb' wild geese entered the airfield and began to bomb the fighter planes that were parked in the US military.

The magazine opened, and sixteen 50-kilogram aerial bombs fell, along a parabola, onto the airfield of the American army, and then a violent explosion occurred. Clusters of orange-red flames shone across the U.S. airfield, engulfing all the neatly parked fighter jets inside.

Forty HB' Hongyan, the aerial bombs carried by the bombers, were enough to destroy the entire American combat at the airport, in fact, after a dozen bombers dropped bombs, the American troops parked on the airfield

'Hurricane, the fighter was completely destroyed. The remaining warplanes were targeted on other buildings at the airport. Pilots' and ground crew's quarters, ammunition depots, repair shops, and oil depots were all targets for bombing.

"Oh God! Help me! "Under the bombing of the Chinese Air Force, the US pilots and ground crews scattered in panic and fled for their lives, and this was the first time they had encountered such a situation. The fighters have been destroyed, and they have no power to fight back.

"Boom!" An earth-shattering explosion sounded, only to see a black mushroom cloud rising into the sky, orange-red fire spreading around, that is, the US military oil depot was blown up, and thousands of tons of fuel stored in it were all destroyed in the explosion!