A payment to a conquering army or king is often referred to as tribute. This payment can take the form of money, goods, or services and is typically made by a defeated state or region to acknowledge the authority of the conqueror, ensure peace, or avoid further conflict. Tribute systems have historically been used to maintain control over territories and to secure loyalty from subjugated peoples.
The Romans spread their power by the strength of their army. It was the army that did the conquering and many times just the threat of the Roman army would cause a would be adversary to negotiate a status for himself as a client king.
The story is that he was set on conquering India, and his army jacked up on him at the Jhelum River, having been fighting for ten years and wanted to go home. It was just as well as King Chandragupta was in the process of conquering eastern India and had an army which would have crushed Alexander's force if they had collided. We have to wonder if Alexander's army had heard about this and it was this factor as well as homesickness which provoked their mutiny.
Some problems about conquering neighboring city states would be that the king or general would have to have an army protecting his home/the conquering place and an army in the city state that was conquered. Very few kings took this risk so they would take all the troops to protect his city state which resulted is looking what he just conquered. Oh well... Sacrifices need to be made!
His job was a commander of an Macedonian army. He doesn't have an empire.
Unfortunately the subjugation of the native population is a matter of course for the conquering army.
The soviet army by conquering the Reichstag
They were into conquering places..( had a grate army)
The conquering army marched triumphantly through the defeated enemy capitol .
It was cut off and added to the train of the conquering king.
They were into conquering places..( had a grate army)
The French Army was not prepared for the severity of Russian winters.
King Alexander the Great of Macedonia.