Han VS Rome

You'll be missed 

Rome and without a doubt.

Looks like me not find worthy opponent, yet.

Rome in the end would win this one Rome is is known well for adapting to it's enemies for example the Punic wars- the first Punic war adapting to Naval warfare and Hannibal using his own tactics against him at Zama. Rome's army isn't as large as China's because I know for a fact that during Qin's reign he could produce an army of 600,000 plus The Romans largest in one battle is 85,000 at Cannae. But i've realised that the Chinese army has depended heavily on numbers and their armies made up of conscription soldiers only up to one year so you could wonder why they had alot of crossbow men. Rome re inforced their armies in times of war with legions they trained their soldiers fairly long before they saw the battlefield also allies who had to contribute to helping Rome numbered in the hundreds of thousands. Though Romes numbers aren't as great Rome has come against big numbers like In Gaul Julius Caesar fought an army over 200,000 plus Gallic men with only 30 to 35,000 men and again against Boudicca with only 10 to 15,000 men deafeated an army of a 100,000 men.

Rome has a better army over all better battle tactics, formations, training, understanding of a new enemy. The costs to wage a war is expensive to both sides that is why Rome has legions but China in the other hand has one big war machine Hundreds of thousands of men in one army. So lets say they invade and are unsuccessful to raise another army could take a while especially if the loss of troops are very bad Rome has the advantage with legions by having seperate armies allows them to join forces with other legions if they are unsuccesful they can be supported by another legion who will aid the other also another army in the tens of thousands can be formed elewhere and make their way there. In times of war legions were larger than the original 5,000 menas  attatchments of it's allies would extend the numbers in one army when joining other legions China will recruit another army For example battle of cannae Rome only had 8 legions but had another 45,000 as it's allies which accounted for more than half the army. Rome at the end of the day have a muh stronger army Rome relies heavily on it's discipline and proffesionalism of the army China relies too much on numbers.