About how many of the unions 180,000 african american volunteers lost their lives during the civil war?

About 70,000 of the union's 180,000 African American volunteers lost their lives during the war.

African-Americans served in the Civil War on both the Union and Confederate side. In the Union army, over 179,000 African American men served in over 160 units, as well as more serving in the Navy and in support positions.  

In the Confederacy, African-Americans were still slaves and 68,178 Union colored soldiers were killed or wounded during the Civil War.

Explanation:

`stare decisis is a legal doctrine that obligates courts to follow historical cases when making a ruling on a similar current or future case. stare decisis ensures that cases with identical facts be approached in the same way, unless overruled by the same court or a higher court such as the us supreme court. simply put, it binds courts to follow legal precedents set by previous decisions.

stare decisis is a latin term meaning "to stand by that which is decided".