threatinning others
No, they did not.
Men of Rome became soldiers by enlisting in the army.
triburary
ancient Rome's Army was not very big compared to army's of today it varies from about 5,000 to 20,000 soldiers
Yes, dumb people can join the army. They may never rise to a high rank, but they can still be soldiers.
As far as I can tell, some of the soldiers were drafted, meaning they were required by law to join the army, or volunteered for the army.
There was not a name for Jewish soldiers. The Jews did not fight in the Roman army.
The soldiers where only loyal to Rome when paid
Possibly. The military does physical examinations on potential soldiers.
Plebeians had to fight in the army as Rome expanded. Many plebeians refused to join the army because the patricians had more freedom in Rome. This caused a conflict between the patricians and the plebeians.
Not in high numbers, no. Most "defectors" Into Axis ranks were soldiers from British colonized lands.
You would not have any choice if you were Phoenician or one of the peoples they controlled you would be in the army of Carthage, if you were a Roman or one of the peoples they controlled you would be in the army of Rome. If you were in a "neutral" people, you would join the army of whoever asked first or they would probably execute you.