They have been around since the birth of the earth's atmosphere.
More men were drawn to the Roman army than to Alexander's army. The Alexandrian army was made up of Greek and Macedonian warriors. Alexander's troops fought for Greece and dignity. The Greek warriors' dignity provided them an advantage in those important fights. The Greeks had been fighting the Persians for so long that they had developed a loathing for them. Some of Alexander's warriors were not as powerful because, unlike the Romans, he had to seek support wherever he could find it. Alexander had no primary spot to which he returned after fights.
To be a good citizen anywhere you have to be a good person. That means showing respect, having a good attitude or just helping out. In the classroom, you have to show responsibility by doing your homework on time, or listening and following directions.
B. It was a center of trade on the Mediterranean
For more than 1000 years Constantinople was the capital of the Byzantine empire. It had an strategic position for trade, and many trading routes passed through there. It was the biggest and richest city in all of Europe.