Why was it an advantage to rome to have a professional army?

Which indo european tribe developed a strong warrior society and built an empire that was frequently invaded by those seeking fertile land

Here’s the first one let me send the next page of the passage

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u.s. citizens need to protect in order to preserve the democratic political system and the american way of life.