For the wound he received at Petersburg Chamberlain was given a penion of 30 dollars a month. At the end of 1892 Chamberlain's wound was troubling him so much that he requested an increase in pension. Fitz John Porter, who later that year would also recommended Chamberlain for a Medal of Honor
wrote a signed affidavit testifying to the severity of Chamberlain's wound (page 14). The medical inspector, though describing a severely infected wound, could not give Chamberlain the
desired increase stating that total disability only occurred about one fourth of the time (page 16).