What state did William Akers live in at the time of the Civil War?
If you have a genealogy library close by it may have microfilm of the Civil War rosters. The Confederate roster is alphabetical for the entire Confederate Army. Look up the name and it will tell which unit he beloged to.
The Union roster is alphabetical by state, so you have know what state this soldier was affiliated with first, before doing a search.
Once you identify the unit William served with there are regimental histories that sometimes record when and where soldiers were killed. Some states even have copies of individual service records at the State Archives.
If you can determine which battlefield he died he may be buried in a cemetery next to that battlefield. The cemetery may list his burial and maybe even the location of his grave site.