66th Ohio Infantry Regiment
military unit
The 66th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. It was noted for its holding the high ground at the center of the line at Antietam as part of Tyndale's 1st Brigade, Greene's 2nd Division of Mansfield's XII Corps.
Service
The 66th Ohio Infantry Regiment was organized at Camp McArthur in Urbana, Ohio and mustered in for three years service on December 17, 1861, under the command of Colonel Charles Candy.
The regiment was attached to 3rd Brigade, Landers' Division, Army of the Potomac, to March 1862. 2nd Brigade, Shields' 2nd Division, Banks' V Corps and Department of the Shenandoah, to May 1862. 2nd Brigade, Shields' Division, Department of the Rappahannock, to June 1862. 2nd Brigade, 1st Division, II Corps, Army of Virginia, to August 1862. 1st Brigade, 2nd Division, II Corps, Army of Virginia, to September 1862. 1st Brigade, 2nd Division, XII Corps, Army of the Potomac, to October 1863, and Army of the Cumberland to April 1864. 1st Brigade, 2nd Division, XX Corps, Army of the Cumberland, to July 1865.
The public source identifies “66th Ohio Infantry Regiment” as military unit. This brief keeps that definition visible, then builds a research path around 66th, Ohio and Infantry.
Why this record matters
A short description can identify a subject without explaining its stakes. For “66th Ohio Infantry Regiment”, the useful work is to connect “military unit” to the records capable of establishing context and consequence.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 20, 2026. The linked authority identifier is Q4642224. The Library of Congress control number is n90630122. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1861, 1862, 1863 and 1864.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “66th Ohio Infantry Regiment”, its source revision and the description used here.
- Expand the search: follow 66th Ohio Infantry Regiment primary sources, 66th Ohio Infantry Regiment archive and 66th research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “66th Ohio Infantry Regiment”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “66th Ohio Infantry Regiment” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.