Question: When was the person on the back of the bicentennial quarter appointed general of Jethro Sumner's military branch?

<P0-S0> On June 15, 1775, the Congress elected by unanimous vote George Washington as Commander - in - Chief, who accepted and served throughout the war without any compensation except for reimbursement of expenses. <SEP> <P1-S0> Sumner was named the commanding officer of the 3rd North Carolina Regiment of the North Carolina Line, a formation of the Continental Army, in 1776, and served in both the Southern theater and Philadelphia campaign. <P1-S1> He was one of five brigadier generals from North Carolina in the Continental Army, in which capacity he served between 1779 and 1783. <P1-S2> He served with distinction in the battles of Stono Ferry and Eutaw Springs, but recurring bouts of poor health often forced him to play an administrative role, or to convalesce in North Carolina. <P1-S3> Following a drastic reduction in the number of North Carolinians serving with the Continental Army, Sumner became a general in the state's militia but resigned in protest after the North Carolina Board of War awarded overall command of the militia to William Smallwood, a Continental Army general from Maryland. <P1-S4> After the end of the war in 1783, Sumner helped to establish the North Carolina Chapter of the Society of the Cincinnati, and became its first president. <P1-S5> He died in 1785 with extensive landholdings and 35 slaves. <SEP> <P2-S0> in 1971, when silver was eliminated entirely from the coins and production increased, the series began to see improved, but still limited circulation. <P2-S1> a special design for the reverse of the half dollar was issued for the united states bicentennial and was struck in 1975 and 1976. in addition to business strikes, special collector coins were struck for the bicentennial in silver clad; silver proof sets in which the dime, quarter and half dollar were struck in 90% silver were first minted in 1992. in 2014 a special edition of the kennedy half dollar was also struck in 99.99% gold. <SEP> <P3-S0> the caning of charles sumner, or the brooks -- sumner affair, occurred on may 22, 1856, in the united states senate when representative preston brooks (d - sc) attacked senator charles sumner (r - ma), an abolitionist, with a walking cane in retaliation for a speech given by sumner two days earlier in which he fiercely criticized slaveholders including a relative of brooks. <P3-S1> the beating nearly killed sumner and it drew a sharply polarized response from the american public on the subject of the expansion of slavery in the united states. <P3-S2> it has been considered symbolic of the ``breakdown of reasoned discourse ''that eventually led to the american civil war. <SEP> <P4-S0> The United States Bicentennial coinage was a set of circulating commemorative coins, consisting of a quarter, half dollar and dollar struck by the United States Mint in 1975 and 1976. <P4-S1> Regardless of when struck, each coin bears the double date 1776 -- 1976 on the normal obverses for the Washington quarter, Kennedy half dollar and Eisenhower dollar. <P4-S2> No coins dated 1975 of any of the three denominations were minted.