The fastest were the smallest Hunhe-class destroyers, which were not modified like those of the Chinese Empire, so they were not equipped with hypervelocity guns, but they were numerous and could still resist the threat from the sky with a dense twin-mounted anti-aircraft guns and anti-aircraft machine guns.

The formation of the Imperial Navy of St. Martin was scattered, and the anti-aircraft firepower was all fighting separately, so the power was naturally much worse, and the bombers of the Boston Empire were helpless. The most effective torpedo planes and dive bombers against warships were too short-legged, and the heavy bombers, which could only bomb horizontally, were too difficult to deal with battleships traveling at high speeds, and the Boston pilots had to reduce the altitude of their planes to less than a thousand meters in order to increase their hit rate.

One side is limited in equipment, and the other is under-prepared, so as soon as the two sides fight, they fall into a stalemate. The Naoli-class battleships also did not have super-high-speed guns, but due to their large hulls, the Naoli-class battleships had a large number of anti-aircraft gun groups.

The anti-aircraft gun mounts placed on the battleship are stacked from the deck to the top of the bridge, and the three-dimensional anti-aircraft fire network should not be underestimated, especially those 127 mm double-barreled high-level dual-purpose guns, shells with air-detonation fuses, which exploded again and again around the B29, greatly threatening the safety of the opponent's airframe.

Seeing that the other side was entangled by the air force, Zumwalt lost no time in ordering the fleet to speed up the approach, and at the same time all the naval guns aimed at the destroyer and fired, he wanted to tear the gap in the opponent's anti-aircraft fire as much as possible to create an opportunity for the bombers.

At Zumwalt's order, the destroyers of the St. Martin Navy were considered to have fallen into bad luck, and in the face of shells of more than 300 millimeters, the weak body of the Hun River-class destroyers, which was less than 2,000 tons, was not vulnerable at all, and soon several destroyers were sunk by the Boston Navy, and one of them was even hit upside down by a 381 mm shell that exploded near the side of the ship.

Admiral Romus was already sweating nervously, and seeing that the destroyers had been sunk repeatedly, he had to order the main guns on the battleship to fire at the opponent to stop the attack of the Bostonians, but the number of opposing battleships was so large that the shells on the Naoli-class battleships could not raise their heads at all.

Soon a 500-kilogram bomb landed on the foredeck of the battleship Casas, and the huge explosion shook the entire hull, piercing through three decks at the same time, and the scattered fragments cut several sailors who had no time to escape in half. Fierce smoke rose and flames burst out of the deck, and the officer in charge immediately ordered the sailors to extinguish the fire, but fortunately, the Naoli-class battleship had five decks with a total thickness of 240 millimeters, so it did not cause excessive damage, and the fire was quickly extinguished.

The cruiser then rushed up, and the 203-mm guns were also loaded with high-explosive shells to fire at the air. The old Lookout-class cruisers equipped with the Saint-Martin Navy have undergone a second refit, which not only increases the anti-aircraft firepower, but also raises the firing range of the main guns to 85 degrees, which is enough to cope with the threat from overhead.

A large number of cruiser main gun shells burst into the air and soon shot down dozens of bombers. Seeing this, Zumwalt also knew that time was pressing, and he immediately ordered his cruisers and destroyers to speed up and get close to the opposing battleships to fire torpedoes.

Vice Admiral Bryce, who had just approached with five Chinese-class battleships, saw the opponent's small warships approaching, and immediately commanded the five Chinese-class battleships to bombard the enemy with their main guns. The 305 mm main gun is a bit backward in hitting the opponent's battleships, but it is still extremely useful for attacking those small tonnage cruisers and destroyers, not to mention that this kind of main gun is faster to load due to its small caliber, and the threat to small warships is greater.

Seeing that the opposing warships had all been concentrated, Zumwalt immediately rushed forward with the main fleet, hoping to stop the attack of the opposing China-class battleships and create an opportunity for destroyers and cruisers to launch torpedoes.

After losing 215 bombers, the first bomber group of the Boston Empire also severely damaged a Naoli-class battleship, in addition to sinking a Zhonghua-class battleship, sinking and damaging more than 30 cruisers and destroyers.

The effect of the bombers was not limited to this, because of their addition, the Boston fleet was able to get closer, greatly canceling out the long-range advantage of the Zhili-class battleships, and they also sank and damaged more than a dozen battleships, including a Zhonghua-class battleship.

Admiral Romus's fleet suffered heavy losses, and he knew very well that he must retreat quickly, otherwise another aerial bombardment would put him in danger of being annihilated. Under his command, all the destroyers went forward at high speed to fire torpedoes, disrupting the rhythm of the opponent's attack, while the whole army slowly retreated, wanting to return to the port of Rio to rest. However, the Bostonians were determined to destroy the Imperial fleet of St. Martin, and Zumwalt ordered the fleet to continue the pursuit, despite the fact that four of his battleships were seriously damaged, two were sunk, and a large number of cruisers and destroyers were also lost.

Romus fought and retreated, hoping to get out of the combat radius of the opposing bombers, but the speed of the warship was limited after all, and soon another dark cloud was pressing over. More than 400 B17 bombers were dispatched this time, and they also came from various coastal airfields.

Due to the lack of range of the old B17 bombers, Zumwalt did not want them to be dispatched, but the battle has reached the most critical juncture, as long as more force can be used to annihilate the opponent's main fleet, the Boston Navy had to reluctantly let these bombers attack.

The combat radius of the B17 bombers is not so large, that is, they buy one-way tickets, and after the bombing there is only parachuting. The Boston Imperial Air Force did not have so many pilots who were not afraid of death, and in order to be able to complete the mission, the air force command secretly manipulated these planes, and the fuel gauge gear of these planes was processed, and the pointer speed was half slower, so that the pilots seemed to have enough fuel to go back and forth.

These Boston pilots, who had no idea of their own situation, used the same low-altitude horizontal bombing method towards the slowly retreating St. Martin's Navy. The San Martin Navy, which was already prepared, quickly used the dense anti-aircraft guns on the warships to create a fire net and envelop the entire fleet. But the daring Boston pilots rushed straight down, the cabin door opened, and a string of bombs rained down on the huge warship.