Which event brought momentum to the movement to lower the voting age from 21 to 18?

The best answer to the question that is being asked and being presented above would be the event of the Vietnam war. The event that is the Vietnam war  brought momentum to the movement to lower the voting age from 21 to 18. 

the following best describes postwar era writers in their works:

progressive

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.

Include the poem for more info but this is what i know about the goddess athena athena is a greek goddess of war and sprang from zeus head full grown in a full set of battle armor.