There has been a mystery about how the Fenian Brotherhood came up with their numbering for their military regiments and it’s overall organization. We know about the 7th Regiment, Irish Republican Army out of Buffalo NY, who gained their fame during the June 1866 Battle of Ridgeway. But what happened to Regiments 1 through 6? Where were these other Fenian Regiments located?
On Jan 21, 1867, President Roberts gave a special order which designated regiments into regions/states within the United States, which would encompass the sequential numbering of military regiments The Irish Republican Army. The number of regiments would go up to 21 and there were separate companies within each regiment.
While many of the lower numbered regiments did actually exist and can be found in newspaper articles drilling or mentioned on parade, the higher numbers, many out West, most likely never existed and was more wishful thinking by the Fenian command and on paper only.
The Fenian regiments did have number designations at Fenian Raid at the Battle of Ridgeway in June 1866. These unit designations were loosely based on regions. The 7th Buffalo, aka 7th I.R.A. Regiment, continued to retain their number, however by early 1867, the other Veteran I.R.A. regiments which saw action in Canada were redesignated:
The 13th Tennessee, originally commanded by General John O’Neill, was renumber to the 18th Tennessee after these orders.
The 17th Kentucky, the Louisville Company which had blue army jackets and green facing on the cuffs were lead by Colonel George Owen Starr, became the 13th Kentucky.
The 18th Ohio, led by Lt Col John Grace and known as the Fenian “Cleveland Rangers” which doned green caps and green overshirts at Ridgeway, was changed to the 12th Ohio based on the location of their region.
“Important Orders” of President Roberts and General Spear on the Organization of the Irish American Army – The Evening Telegraph (Philadelphia, PA) Feb 12, 1867
This map shows the Fenian Brotherhood Regiments organized throughout the United States.