The answer is to make it easier for immigrants to vote in elections
What was common is that they were both fought as plans of Lee to move the fighting no Northern Parts of the federation. Antietam ended in a draw, while Gettysburg became a victory for the Union.
It could attack different countries at the same time...
The U.S supported israel while Soviets supported syria and egypt
The only answer I found was: The ancient Chinese kings maintained control of their dynasties throguh military means.
You probably go to connections accademy. I do too.
This question is in the Journey Across Time text book on page 231. The answer is on pages 225 - 231.
Besides the two answers above me, I managed to find a reasonable answer:
"Rulers became powerful because they controlled land and had strong armies."
This is all I could find, hope this benefits others who wonder what the answer is!