Question

What was unique with the six new states admitted between 1816 and 1821? Suffrage was granted to all men. Suffrage was granted to all land owners, men or women. Suffrage was granted to all white men. Suffrage was granted to white women.

Answer 1

I believe the answer is: Suffrage was granted to all men. 
Prior  to this, suffrage was limited for white men only, they expand this to all Men in order to find volunteer for the war.
Women in united states just only obtained the suffrage and had the right to vote by the year of 1920

Answer 2

suffrage was granted to all men