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The entire 8th of February was a disaster for the U.S. military defending Tierra Colorada. After finally repelling the attack of the Japanese mercenaries, at half past two in the afternoon, the airship unit of the Chinese Air Force came again and dropped 80 tons of aerial bombs on the No. 1 height. The huge force almost blew up all the hills of Heights No. 1, and the American troops guarding here suffered heavy losses.

After repelling the attack of the Japanese mercenary 14th Division in the morning, the 101st Division, which had suffered heavy losses, had withdrawn from the battle, and the responsibility of defending the No. 1 Heights fell to the 102nd Division of the US Army. Although, tens of thousands of officers and men of the 102nd Division of the US Army took advantage of the gap between the squadron's attacks to repair the positions on the No. 1 high ground. But because many of the fortifications had been destroyed, they were only able to repair part of it, and at most they could deepen and consolidate the trenches, re-draw a barbed wire fence, and bring the heavy machine guns and mortars they had brought into the positions. For the most important anti-artillery holes and tunnels, there is no other way but to find some timber to reinforce them. After all, these anti-artillery holes and tunnels were the means to save their lives in the face of heavy artillery fire from the Chinese Army and bombardment by the Air Force's airship units.

However, even so, many officers and men of the 102nd Division of the US Army were killed in the second round of bombardment by the Chinese Air Force, and the total number of killed and seriously wounded US soldiers was 3,000, which was already one-third of the entire division. With the addition of lightly wounded soldiers, the entire 102nd Division of the US Army has lost more than half. If it weren't for the fact that the airship unit of the Chinese Air Force had only prepared two rounds of bombing on the first day of bombing, the US military would have paid even greater casualties. But even this made the US military very uncomfortable. Lieutenant General Clark had to throw more troops into Heights 1 to fend off the squadron's attack. This tactic is completely fighting with the Chinese army and the Japanese mercenaries. However, there were only 400,000 U.S. troops in the entire Tierra Corollada, while the Chinese Army and Japanese mercenaries combined numbered 700,000. After the airship units of the Chinese Air Force joined the war, the balance of victory was already tilted on the Chinese side!

Chilpansingo, in the U.S. Army command, after Admiral Pershing received a telegram from Lieutenant General Clark asking for help. The whole person fell into irritability. He had already sent reinforcements from two armies to Tiela Cororada, thinking that with the complete fortifications of Tiela Cororada, no matter how much he could make the Chinese army and the Chinese servant army meet there, and pay heavy casualties. But he never imagined that the Chinese would actually throw an airship into Tiela Corolada. The fortifications of Tiela Corolada though strong. However, it could not resist air strikes, especially the bombing of heavy aerial bombs, and it was more capable of destroying the US fortifications with ease.

"Davis, it looks like we're going to have a tough fight in Ironra Colorada. Clark could not guard against the threat from the air, and in order to hold the No. 1 height, he could only fight with the Chinese. And in terms of troops, Clark does not have any advantage. Even under the air strikes of the Chinese. We have suffered more casualties than the Chinese. The current battle situation is already very unfavorable for us! Admiral Pershing said with a frown. Originally, he had a lot of confidence in the defense line of the Sierra Madre do Sul. With the help of the tall mountains already in the north of the Balsa River to build a defensive line. It can make the US military on the defensive take a big advantage. At the same time, the U.S. military is no longer inferior to the Chinese Army in terms of weapons, but it is only inferior in individual soldiers. However, the American forces had an absolute superiority in numbers, which gave Admiral Pershing a very good chance of holding the squadron west of the Sierra Madre do Sul. Even he's still planning. After the squadron paid a heavy price, the American army concentrated its superior forces. Defeating the squadron in one fell swoop, even if it cannot drive the squadron out of the North American continent, will make the squadron pay a heavy price, so that it will not dare to invade the United States again. However, after the start of the war, it went completely in a direction that Admiral Pershing had not anticipated.

"General, the Chinese dispatched airships, which was indeed unexpected by us. However, what surprised us even more was that their airships were much more powerful than German airships. When the Germans attacked the fortress of Liège last year, they also dispatched large airships, but the real results were pitiful. Under such circumstances, Lieutenant General Clark can only use his life to fight with the Chinese, which is also unavoidable. The defense of Tierra Corolada is mainly based on the three surrounding highlands. Heights 1 is the shortest, but it is also the most central position, and if it is occupied by the Chinese, there will be huge holes in the defense line of Tiela Cororada, and our defense plan in Tiera Coroda is also likely to fail. Lieutenant General Davis, commander of the 14th Army of the U.S. Army, said.

"I have sent a telegram to Admiral Leonard Wood requesting support from the Army's airship unit. We also have a large fleet of airships, which were built a few years ago, and there are hundreds of them. It's just that it will take some time for the airship troops to reach the defense line of the Sierra Madre do Sul. In the course of this time, we will probably have to pay a huge number of casualties! Admiral Pershing said. The transportation conditions on the back of Mexico are relatively good, and the airship units of the US Army can rely on rail and road for transportation, but in the southwestern region of Mexico, the traffic conditions are more difficult, which makes the airship units of the US Army have to spend more time on the road. Most of the airship units of the United States belong to the Army, and the Navy also has a small number of airships, which are mainly used to provide firepower for battleships and coastal patrols. In fact, after China's airships shone in the war against Russia more than ten years ago, all countries have also stepped up the research and construction of airships. Because of its close relationship with China, Germany obtained a complete set of design drawings, and on the basis of this, the 'Zeppelin Heavy Airship' was developed. Progress in other countries has been much slower, and the United States has acquired the relevant technology from Britain and France to build its own 'Freedom-class' airship. It's just that the US military's split load capacity is only 1.5 tons, which is only equivalent to the medium-sized airship of the Chinese Air Force's airship unit. Because of the engine, the speed of the US airship unit is only about 40 kilometers, which is much behind the airship unit of the Chinese Air Force.

"General, there is no way around it, we can only buy as much time as possible and wait for the airship troops to arrive. In order to strengthen the strength of Tiela Corollada, I will once again send them one or two more troops! Lieutenant General Davis said.

Admiral Pershing hesitated for a moment, but finally nodded, now the U.S. army only has 400,000 troops in Chilpansingo, and after another 100,000 troops are transferred to Tierra Corollada, the reserve force of the U.S. Army will only be 300,000, and this amount of troops, Admiral Pershing no longer knows if it will be enough to launch a counterattack at that time. It's just that now I can't care about anything else, and I have to defend Tiela Corolada first. If it really doesn't work, we can only draw troops from other parts of the defense line. The squadron launched a fierce attack on the Sierra Madre do Sul, but the most intense was undoubtedly the line from Hartiangis to Tira La Corolada and Chilpancingo, and the rest of the area was much less intense, as if it were mere feints.

After Admiral Pershing made his decision, the next day the American troops of both corps set out from Chilpansingo and rushed to Tiela Cororada. After learning of Admiral Pershing's decision, Lieutenant General Clark finally breathed a sigh of relief.

Similarly, Admiral Leonard Wood, chief of staff of the U.S. Army, who was far away in Washington, was shocked to learn that China had sent airship troops to bomb the Tierra Cororada, and that the U.S. military had suffered heavy casualties. After consulting the Secretary of War Jacob M. Dickinson, he immediately issued an order to the airship unit to support the Sierra Madre do Sul, requiring the US airship unit to send at least 150 airships to the Sierra Madre do Sul to defeat the attack of the Chinese airship unit. Both Admiral Leonard Wood and Secretary of War Jacob M. Dickinson knew that if the Chinese Air Force's airship units could not contain the endless bombardment of the Iron La Colorada, the U.S. Army's defense line in the Sierra Madre Sur, no matter how strong, would have been breached. Without this natural barrier, the Chinese Army will be able to drive straight into the north-central region of Mexico. And from north-central Mexico, you can directly threaten the United States! They absolutely don't want that to happen!

After receiving the order, the airship unit of the US military set off the next day. It's just that it takes a lot of time to rush from the hinterland of the United States to Mexico, and these times can only be won for them by the officers and soldiers of the US Army with their lives.

Beginning on 8 February, the airship units of the Chinese Air Force bombed the US Army's No. 1 Heights or other defensive positions two or three times a day, causing heavy casualties to the US troops. But at the insistence of Lieutenant General Clark, the U.S. Army firmly held Heights 1 in their hands, one division was exhausted, and the other division would be immediately replaced, and all the fortifications were destroyed, so they would fight the squadron without fortifications. Although, in this way, in just ten days, the US military paid the price of 100,000 casualties. However, it also bought them enough time.

Under the repeated urging of the US troops on the front line, the 50 airships of the US Army's airship unit finally arrived in Chilpancingo on the afternoon of 19 February, and the air battle between the airship units of China and the United States will also be on the verge of breaking out!