Is this the picture you're referring to below? This is the 1866 Southern Cherokee delegation sent to Washington to negotiate with the US govt after the war. There was a delegation of "Loyal" Cherokee in Washington at the same time. The US govt prefered to negotiate with the Southern Cherokee.
Left to Right:
John Rollin Ridge (son of John Ridge)
Saladin Watie (son of Stand Watie)
Elias C. Boudinot (son of Elias Boudinot, i.e. Buck Oowatie)
Col. William Penn Adair
John Rollin Ridge is the son of John Ridge, leader of the Ridge Party (Treaty Party), and grandson of "The Ridge" or Major Ridge, Speaker of the National Council before the removals. John Ridge was a first cousin of Stand Watie so John Rollin Ridge is Watie's "1st cousin once removed".
Elias C. Boudinot was the son of Elias Boudinot (Buck Watie) -- Stand Watie's brother. He was the Cherokee representative to the Confederate Congress.
Col Wm Penn Adair was, of course, colonel of the 2nd Cherokee Mtd Volunteers. (A little triva for you Okies out there. Will Rogers' full name was William Penn Adair Rogers in honor of his ancestor.)
When the leaders of the Ridge/Treaty Party were assassinated for signing the Treaty of New Echota, John Ridge, Major Ridge, and Elias Boudinot were all killed on the same day.
Watie, of course, escaped assassination but later killed his would be assassin at England's Store on the Line Road just south of Maysville. Since he was in Arkansas at the time, he turned himself in at Van Buren AR where he was tried and found not guilty for reason of self defense. Had he been tried by the Ross-controlled government in the Cherokee Nation, he would have undoubtedly been hung for murder.
John Rollin Ridge killed a member of the Ross Party and fled the Cherokee Nation. He spent the war in California. He was an author and journalist and worked for a Sacramento newspaper -- his pen name was Yellow Bird. There is correspondence between him and uncle Stand Watie in Cherokee Cavaliers.
As for the Richard Fields in the picture, I believe this is Capt. Richard Fields that was captured at Pea Ridge and later on Watie's staff. He was father-in-law of Union brevet Major General Delos Bennett Sackett. Fields lived on Bayou Menard near Ft Gibson and his daughter met and married then Lieutenant Sackett when he was stationed at Ft Gibson in the 1840s. He died in Washington DC in 1873 and is buried in the Congressional Cemetery.