 Real Name
James Buchanan Barnes
Real Name
James Buchanan Barnes 
Occupation Adventurer; formerly S.H.I.E.L.D. operative, Soviet assassin, freelance assassin, sidekick to Captain America, army mascot
Adventurer; formerly S.H.I.E.L.D. operative, Soviet assassin, freelance assassin, sidekick to Captain America, army mascot   Citizenship 
U.S.A.
         Place of Birth
Shelbyville, Indiana
         Known  Relatives
George M. Barnes (father, deceased); Winnifred C. Barnes (mother,  deceased); Ida (aunt, presumed deceased); Rebecca P. Barnes Proctor  (sister);  Proctor (first name unrevealed, brother-in-law); unidentified  niece and  nephew; Scott Proctor (grandnephew); Kimberly
  Ida (aunt, presumed deceased); Rebecca P. Barnes Proctor  (sister);  Proctor (first name unrevealed, brother-in-law); unidentified  niece and  nephew; Scott Proctor (grandnephew); Kimberly Proctor  (grandniece)
 Proctor  (grandniece)
        Group   Affiliation
Avengers; formerly Kid Commandos, Liberty Legion, Invaders (wartime), Young Allies; former partner of Captain America
  Education
High school dropout
       Height
5'9"
        Weight
260 lbs.
      Eyes
Brown
      Hair
Brown
       Powers 
When  becoming Winter Soldier, Bucky was given a bionic left arm, which  grants him a degree of superhuman strength, enhanced reaction time,  sensory array, electrical discharge, and Bucky can even control his  bionic arm from a distance (in case it were separated from his body) due  to a cybernetic implant. As  his career progressed as Captain America, Nick Fury found it necessary  to upgrade his arm to be fully synthetic in order to look and feel real.
 Abilities 
He  is an Olympic-class athlete and exceptional acrobat highly skilled in   both unarmed and armed hand-to-hand combat and extremely accurate   marksman. He is fluent in four languages including German and Russian. 
Other Info
Born in 1925, James  Buchanan Barnes lost both his parents early in his  life; his mother  had died when he was a child and his father had died in  an accident  while in basic training at Camp Lehigh shortly before  Christmas in 1937. He  was separated from his younger sister Rebecca, who was sent to   boarding school while he persuaded officials into letting him remain at   camp Lehigh as a ward of the state due to sharing his father's love of   the armed forces. Barnes was eventually considered the camp mascot and given the  nickname "Bucky."
During  World War II,  Bucky soon began to receive select assignments as  a  special military operative, having received hand-to-hand combat   training with British Commandos. He met and befriended a young and  somewhat naive private Steven Rogers, who had recently become the  government operative, Captain America. Bucky was assigned to accompany Rogers, but was initially unaware of the   true nature of his work. However, one night, Barnes happened to walk  into Rogers' tent  just as he was changing to his masked identity. Sworn  to secrecy, Barnes  joined Captain America on his first mission against  the Red Skull, freeing many Nazi prisoners. After this, for several months, Barnes underwent an intensive training program under Captain America's tutelage.  He officially became Cap's sidekick and the two went on many missions  together.  (To learn about Cap and/or the Red Skull, click on their  highlighted name above.)
When  America entered WWII after the bombing of Pearl Harbor on  December  1941, Captain America and Bucky abandoned their military  identities for  most of the war to devote their full energies to serving  as costumed  freedom fighters. They soon found themselves allied with the  Sub-Mariner, the original Human Torch, and his young mutant partner Toro, in a team that Winston Churchill dubbed the Invaders.   Bucky served Captain America and the Invaders capably and faithfully,   leaving the team only temporarily to organize and lead his own team of   teenage soldiers, the Kid Commandos.   Once, to rescue the Invaders from the Red Skull, Bucky assembled a  team  of costumed super-humans who operated on the home front, a group  that  would remain together until the end of the war and was known as  the Liberty Legion. Bucky also worked with another group of teenagers known as the Young Allies.  (Click on the highlighted names above to learn about the characters and/or teams.)
Toward the end of the war in late 1945, on a final mission against Baron Zemo,   Bucky and Cap hopped on an experimental drone plane in an attempt to   disarm a bomb. The bomb detonated, dropping Cap in the North Atlantic  (where he would later be found and thawed out in the future by the Avengers).  On the other hand, American  forces never found Bucky's body, and he  was presumed dead.  However, unbeknownst  to the Americans, Bucky was  found and revived by Russian General Vasily  Karpov. (To learn about the  above highlighted characters and/or team, just click on their name.)
When  Bucky awoke, he had no memory of his identity, which gave Karpov  an  opportunity to reprogram Bucky as a Soviet assassin called the  "Winter  Soldier." In addition, during the explosion on the plane, Bucky lost his  left arm. Therefore, Bucky was outfitted with bionic left arm to assist  him in his future duties. The Winter Soldier was sent all across the  globe, committing political  assassinations with huge effects on the  Cold War.  However, his memory  implantation caused mental instability,  and he was kept in stasis  between missions to prevent rebellion. (Bucky  as the Winter Soldier is shown in the third and forth picture posted  above.)
It was during this period that Bucky met Natasha Romanoff  (aka Black Widow),  whom he helped train in combat while she was  undergoing espionage  training. Soon afterward, the two fell in love.  Barnes would often sneak out into her sleeping  quarters just so he  could see her. However, this relationship did not last, and the two  separated as friends. (To learn about the Black Widow, click on her  highlighted name above. Note: Beware of the extremely form-fitting  outfits on Black Widow's bio page.) 
Later, Winter Soldier was given the mission to aid in his wartime ally James Howlett's (aka future Wolverine) escape from the Weapon X  laboratory. However, part of his mission was to also kill Howlett's  then pregnant wife Itsu, and the Winter Soldier came through on both  parts of his mission.  (To learn about Wolverine and/or the Weapon X  program, click on their highlighted names above.)
Desiring the Red Skull's Cosmic Cube for himself, former Soviet general Aleksander Lukin  hired the Winter Soldier to assassinate the Red Skull. After this was  done and the Cube was taken, Lukin wanted to mess with Cap's mind;  therefore, he commanded the Winter Soldier to kill Jack Monroe and  launch a major terrorist attack on the city of Philadelphia, fueling  the Cosmic Cube's power in the process. However, when the Winter Soldier  kidnapped S.H.I.E.L.D. agent Sharon Carter, she told Captain America (upon her rescue) that she believed her captor to be Bucky. Later, Nick Fury  confirmed to Cap that the Winter Soldier was indeed his former partner.  (Click on the highlighted names above to learn about the characters,  object, and/or team.)
Afterward,  when Lukin ordered the Winter Soldier to bury the Cosmic Cube in an  underground bunker, Captain America (with help from the Falcon and Iron Man)   tracked him down and defeated him. After the battle, Cap used the   Cosmic Cube to restore Bucky's memories. Overcome with remorse, Barnes  then used the Cube to disappear and went underground to search for  Lukin.  Everyone, but Captain America, believed Bucky had died. (To  learn about Falcon and/or Iron Man, click on their highlighted names  above.)
Over sometime, Barnes eventually encountered the Young Avengers' Hawkeye and Vision  and learned how his and Cap's adventures had  inspired contemporary  heroes. Later, Bucky also reconciled with his former  Invaders teammate  Namor, assisted Wolverine with incapacitating his son  Daken (who had earlier been presumed dead), and comforted a cynical Patriot (Elijan Bradley). (Click on the highlighted names above to learn about the team and/or characters. Note: Beware of Hawkeye's revealing outfits on the Young Avengers' and her bio page.)
When the Superhuman Registration Act   was passed, S.H.I.E.L.D's Nick Fury recruited Bucky for covert   operations, so as to protect Captain America from government forces.  However, following Captain America's assassination, Barnes resolved to  kill Iron Man. When Bucky was able to confront Iron Man, he  disabled  his armor and fought him to a standstill. However, it was then  that he learned of his Cap's  final requests of Stark: to rescue Barnes  from his descent into violence  and insanity, and to pass the Captain  America identity to a successor.  Stark felt the best way to honor both  his friend's requests was for  Barnes to become Captain America. Barnes  agreed and became the  new Captain America. (To learn about the  Superhuman Registration Act, just click on the highlighted name above.  Note: Bucky as the new Captain America is shown in the fifth picture  posted.)
Now residing in Steve  Rogers' S.H.I.E.L.D. safe house, Bucky outfitted  himself with an  alternate version of Cap's costume built by Tony Stark  and carried his  indestructible shield along with other weapons. Although  he was  reformed, there were still a few officials from both America and  other  foreign nations who had not all forgotten Bucky's past as the Winter   Soldier. 
Later,  it was discovered that Rogers had actually survived his assassination. When Rogers  returned, however, he officially and respectfully handed the Captain  America mantle over to Bucky--giving Bucky his blessing. Barnes then  continued on as Captain America with the Avengers  while Rogers accepted a  federal role as an administrator managing  super-heroes.
 
More recently, when Sin  led an attack on Washington, D.C.,  Bucky was there to oppose her.  However, her power proved too great and  he was mortally wounded. (To  learn about the Red Skull's daughter, click on the highlighted name  above. Note: Beware of the revealing outfit on Sin's bio page.)
To  learn more about Bucky Barnes, click on the following link, http://marvel.com/universe/Captain_America_%28James_Barnes%29.