white males
This was an effort espoused by "Jacksonian democracy" (in reference to Andrew Jackson). The stated intent was to allow common Americans to have more influence in the political processes.
The expanding of the democratic franchise aimed at getting rid of property requirements for voting. That benefit thus went to white males. It didn't do anything for blacks under slavery, of course, and and wasn't at all concerned about giving voting rights to women.
The correct answer is the Battle of Shiloh.
The Battle of Shiloh took place on April 6th and 7th of 1862. This battle took place in Hardin County Tennessee. This was ultimately a Union victory but the casualties on both sides were catastrophic. This was the bloodiest battle in American Civil War history besides the Battle of Antietam.
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About one fourth of them were