Is this a good campaign poster reason sorta thing?!?

Question

I'm supposed to do something will a campaign poster for Social Studies and were supposed to have three reasons to join the North (Union) or the South (confederacy).
are these goode reasons to join the the North.?

1: We have a population of 22 million,
2. More farms to provide food
3.Were richer and more advanced in our technology than the south

Answer 1

I think you are forgetting the most important aspect--eventually even if it might not have been a reason from the start. --Slavery.

The North was against the continuation of Slavery.

The North was for a strong centralized national government as well.

Good Luck....

Answer 2

yes you could have also used better transportation network,(canals, and railroads) or that the army was better trained and better supplied