U.S. Army
John I Slack
April 25, 1840—January 15, 1933
Life Timeline
92 years1840
Born
April 25, 1840
US ARMY
Service Record
1933
Passed Away
January 15, 1933
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Sourced from official cemetery data; last updated May 30, 2026.Learn more