Final answer:
The Military Voters Act of 1917 extended voting rights to soldiers serving overseas and women military relatives, through the use of mail-in ballots to facilitate voting from afar.
Step-by-step explanation:
The Military Voters Act of 1917 was a strategic law used by the Borden government to secure votes for a Union Government. Under this act, the right to vote was granted to soldiers serving overseas, including women in the military (nurses) and women military relatives of those serving. To ensure all eligible voters could exercise this right, provisions were made that allowed for mail-in ballots, which enabled voting to be conducted overseas.