For the coalition forces that have already reached their doorstep, the Romans are united in hatred and hatred.

Every day, large numbers of Roman legions from various parts of the European continent converged on the Italian mainland to fight to defend Rome.

The Roman legions greatly outnumbered the allied forces, which now maintained a slight advantage only by virtue of their advanced firearms.

Several chiefs of staff of the Han army were thinking about new methods at every turn.

Zhuge Liang proposed that according to the intelligence of the Ministry of Intelligence, the Roman Emperor Caracalla was so happy that we could invite him to fight head-on and decide the outcome of the battle.

Lü Bu agreed with this resolution very much, and sent a letter of decisive battle to the Roman Emperor Caracalla, hoping to have a decisive battle with the Roman legions under the city of Rome.

Caracalla received Lu Bu's letter of decisive battle, and he certainly hoped that he would be able to complete the battle and decide the victory or defeat in one battle.

Of course, the Roman senators of the Senate were resolutely opposed, believing that as long as they persevered, they would be able to win, and there was no need for any decisive battle with the coalition forces.

Lu Bu had no hope of winning, so he thought of such a way, and they refused to allow Caracalla to lead his troops into battle.

But Caracalla was a stubborn man, and how could he be at the mercy of the Senate for what he believed?

He ordered the closure of the Roman Senate, and then mobilized all the troops in Rome to fight a decisive battle against the Han army on the outskirts of Assion.

Bands of Roman legions, auxiliaries, reserve legions, and barbarian armies were concentrated in Assision from Rome and the surrounding satellite cities, and Caracalla was pouring out this time.

He mobilized a hundred Roman legions, auxiliary legions, and reserve armies, as well as an army of 200,000 barbarians, for a total of more than 700,000 troops.

Lü Bu also summoned all the forces of the Han and Persian coalition forces that had entered the European continent, except for the troops guarding the cities and strongholds along the route and protecting logistics and supplies, and the rest of the combat troops were also concentrated in Assion.

The coalition army had 25 divisions of the Han army and 200,000 Persian troops, totaling nearly 600,000 people.

Assision and its surroundings were transformed into large barracks, where the armies of both sides converged.

The main armies of both sides fought against each other on a plain twenty miles northwest of Assion, and Caracalla asked to meet Lü Bu, to whom Lü Bu readily agreed.

January 221 was another great moment in history.

The Roman Emperor Caracalla, the Han Emperor Lü Bu, and the Persian Emperor Ardashir I, three great monarchs, had an unprecedented meeting outside the city of Assision, so later generations also named the Battle of the Three Emperors.

Both sides brought their interpreters and met for the first time in front of the two armies.

Caracalla rode in a chariot made of gold, with only an interpreter and a coachman, while Lübu and Ardashir I rode to the front of the battle with an interpreter each.

Behind Caracalla were thirty of the most elite Roman legions, none of the auxiliary legions, all Roman legions.

Both in stature and appearance, more than half of the soldiers of the legion are veterans of the battlefield, and they are the essence of the Roman legion.

They have long since completed the reloading of firearms, and even ten regiments have been reloaded with breech-loading rifles, which are somewhat more advanced than rifled guns.

Among the thirty legions, there is also a single remaining chariot legion, equipped with a thousand two-man chariots.

The only two remaining legions of heavy cavalry, a full 10,000 heavy cavalry, and they were also the only Roman legions not armed with muskets, still using traditional spears.

The fifteen divisions of the Han army were also elite, including the three ace divisions of Lu Bu's Imperial Forest Army, the five divisions of the Haotian Army, and the first, second, third, and fourth infantry divisions of the Imperial Army.

The 1st and 2nd Cavalry Divisions of the Imperial Army and the 1st Marine Division, all armor divisions.

This is definitely an unprecedented Armageddon in the history of mankind, and it is also the pinnacle of weaponry at that time.

The three emperors of the most powerful empire in the world had a brief exchange, and they could be regarded as sympathetic to each other, and the two sides confirmed each other's conditions.

If the Han and Persian sides prevailed, the Roman Empire gave up its stubborn resistance in Rome and peacefully accepted the occupation of Rome by the coalition forces, but the coalition forces also had to ensure the integrity of Roman buildings and peaceful means against Roman citizens, and did not kill innocents indiscriminately.

However, the Roman Empire did not surrender to the coalition side because of this, and the decisive battle was limited to the ownership of the city of Rome and nothing else.

If the Han and Persians were defeated, they would withdraw from Italy proper, and as for the subsequent war, it would be up to them.

After the conditions for the decisive battle were finalized, the monarchs of both sides returned to their respective camps.

With the decisive charge of the Roman chariot legions, the curtain of the Battle of the Three Emperors began.

The entire battle was not confined to this main battlefield, but throughout the Assicion region, where both sides were engaged in large-scale troop movements.

The main battlefield is a direct collision of elite troops from both sides. The Han cavalry corps attacked from both flanks and fought directly against the light and heavy cavalry of the Romans.

The Han cavalry was still mainly based on long-range shooting, supplemented by close combat, while the Roman cavalry was the opposite, they were mainly based on melee combat, supplemented by long-range shooting, so the Roman cavalry was active from the beginning and tried their best to get closer to the Han cavalry.

The battlefield on both flanks is the world of cavalry, while the central battlefield is the opposition of the infantry of the two sides, and the infantry on both sides play basically the same, first with artillery bombardment, and then with infantry charging.

Both sides were armed with muskets, grenades, and bayonets, so whether it was long-range shooting or hand-to-hand bayonet hand-to-hand combat, they were evenly matched.

The Romans had the racial advantage of being tall and strong, while the Han army relied on cooperation with each other and skilled individual fighting skills.

After all, the technique of fighting bayonets has appeared in the Han army for a long time, and it has long become a daily training subject, with many tricks and tricks, and the confrontation between power flow and technical flow is equal.

After getting close, the artillery of both sides could only bombard the follow-up troops of the other side as best they could, and the troops in the front line were intertwined with dogs' teeth, and they could not get artillery support.

The main battlefield was evenly matched, but in other battles, especially those dominated by the Persian army, the Romans began to gain the upper hand, and they took advantage of their numbers.

The equipment of the Persian army was obviously inferior to that of the Han army, the rate of fire of rifled guns, and the fact that the Persian army retained a large number of cold-weapon troops, made the Romans fearless of them, and the Romans even focused their attacks on the Persians.

The Roman legions, auxiliary legions, and even the barbarian armies slapped on the Persian line like a flood, and compared with those experienced Roman veterans, the Persians' will to fight was much weaker, and even the northern barbarians could not catch up.