Question: After the the fall of what city was the regiment formed whose Civil War Confederate unit was also called Trader 's Battalion in Arkansas ?

text: List of Arkansas Civil War Confederate units
State Troops -- List of Arkansas State Troop units

This is a list of Arkansas Civil War Confederate Units, or military units from the state of Arkansas which fought for the Confederacy in the American Civil War. The list of Union units is shown separately. Like most states, Arkansas possessed a prewar Militia organization, which consisted of seventy one regiments, organized into eight brigades, and divided into two divisions. In addition to its standard militia regiment or regiments, each county was authorized to create up to four Volunteer Militia Companies. While none of the prewar militia regiments were enrolled into Confederate service, many of the existing Volunteer Militia Companies were enrolled into new volunteer regiments. Other new Volunteer Companies were raised with no connection to the prewar militia. Immediately following secession, the State Military Board began organizing regiments of State Troops. Many of these regiments were eventually transferred into Confederate Service. Some Volunteer Regiments were organized under direct authority of the new Confederate Government and were never organized as State Troops. In April 1862, the Confederate Congress passed a conscription law and new companies and regiments were organized almost entirely of conscripted (drafted) men. Volunteers usually went into already existing units. The secession convention also authorized each county to organize Home Guard units made up of men too young or too old or otherwise exempt from conscription or militia service.
Unit Commander Alternate Designation Final Designation
1st Regiment , Arkansas State Troops Colonel Patrick R. Cleburne 1st Arkansas Volunteer Infantry 15th ( Josey 's ) Arkansas Volunteer Infantry
3rd Regiment , Arkansas State Troops Colonel John R. Gratiot 2nd Regiment , Arkansas State Troops Gratiot 's Regiment Disbanded following Battle of Wilson 's Creek
4th Regiment , Arkansas State Troops Colonel J. D. Walker Walker 's Regiment Disbanded following Battle of Wilson 's Creek
5th Regiment , Arkansas State Troops Colonel Thomas P. Dockery Dockery 's Regiment Disbanded following Battle of Wilson 's Creek
5th Regiment , Arkansas State Troops ( Cross ) Colonel David C. Cross Fighting Fifth 5th Arkansas Volunteer Infantry
6th Regiment , Arkansas State Troops Colonel Richard Lyon  6th Arkansas Volunteer Infantry
7th Regiment , Arkansas State Troops Colonel Robert G. Shaver Bloody Seventh 7th Arkansas Volunteer Infantry
8th Regiment , Arkansas State Troops Colonel William K. Patterson  8th Arkansas Volunteer Infantry
1st Cavalry Regiment , Arkansas State Troops Colonel DeRosey Carroll Carroll 's Regiment Disbanded following Battle of Wilson 's Creek
Helena Artillery Captain A. W. Clarkson Captain John H. Calvert Captain Thomas J . Key Key 's Battery Clarkson 's Battery , Company C , 20th Alabama Light Artillery Battalion Company H , 28th Georgia Artillery Battalion
Jackson Light Artillery Captain James G. Thrall Captain George W. McCown Captain George T. Hubbard Thrall 's Battery McCown 's Battery 3rd Arkansas Light Artillery
Pulaski Light Artillery Captain Robert C. Newton Captain William Edward Woodruff , Jr Woodruff 's Battery Weaver Light Artillery 3rd Arkansas Field Battery Disbanded following Battle of Wilson 's Creek Reformed later as the Weaver Light Artillery
Fort Smith Artillery Captain John G. Reid Ried 's Battery Disbanded following Battle of Wilson 's Creek
Clark County Light Artillery Captain Frank Roberts Wiggins Arkansas Battery Robert 's Arkansas Battery 2nd Arkansas Light Artillery
1st Regiment , Northwest Division Colonel Frank Rector Rector 's War Regiment 35th Arkansas Infantry Regiment
2nd Regiment , Northwest Division Colonel William H. Brooks  34th Arkansas Infantry Regiment
3rd Regiment , Northwest Division Colonel Charles W. Adams Adams 's Arkansas Infantry Regiment Disbanded following Battle of Prairie Grove
1st Battalion , Arkansas State Troops Colonel William H. Trader Lieutenant Colonel Allen T. Pettus Colonel Robert C. Newton Trader 's Battalion Arkansas State Troops Pettus 's Battalion Arkansas State Troops 3rd Regiment of Arkansas State Cavalry 10th Arkansas Cavalry Regiment ( Newton 's )
2nd Battalion , Arkansas State Troops Lieutenant Colonel John Crowell Wright Wright 's Battalion Wright 's Cavalry 12th Arkansas Cavalry Regiment