WinterBaron

WinterBaron is the slash ship between Baron Helmut Zemo and James "Bucky" Barnes from the Marvel Cinematic Universe fandom.

Captain America: Civil War
Zemo blamed the Avenger for his family's deaths. Knowing he could not hope to win by force, Zemo sought to manipulate the Avengers into destroying each other. One of his plans included using Bucky Barnes as a tool for pitting The Avanger against each other. To initiate his plan, Zemo located Vasily Karpov, one of the former leaders of the Winter Soldier Program, who was in hiding as HYDRA had been wiped out. Eventually, he killed Karpov and obtained Winter Soldier Book. Using all the information he had obtained, Zemo then proceeded to frame the former Winter Soldier, Bucky Barnes, into taking the fall for a bombing which then killed the Wakandan king T'Chaka. Bucky Barnes was eventually caught and subdued. Once the Avengers' co-leaders had gathered forces for their factions and fought each other to a near-standstill over their continued tensions surrounding the Winter Soldier's escape and how it impacted the Sokovia Accords, Zemo continued his plans as he prepared to travel to Siberia. Zemo eventually arrived at the HYDRA Facility all of found some Winter Soldiers who were still held inside Cryostasis Chambers, peacefully awaiting their next orders. Zemo killed all those five soldiers in their sleep.

Later, Bucky Barnes, Steve Rogers, and Tony Stark arrived to the HYDRA Facility. Zemo played them a footage of the Winter Soldier tracking down and killing Howard and Maria Stark. Just as Zemo had planned, seeing his parents being killed by the Winter Soldier drove Stark into a fit of rage, made worse as Rogers revealed that he had always known this, resulting in Stark furiously attacking his former allies to kill the Winter Soldier, while Zemo then quietly escaped during all of the chaos. He was eventually found by T'Challa and then tried to killed himself to reunite with his family, but was stopped by T'Challa. Zemo then got arrested for his crimes in Berlin Prison.

The Falcon and The Winter Soldier
Seven years after Zemo got arrested, Barnes found that someone had been recreated the Super Soldier serum. Assuming that HYDRA had something to do with this, Barnes gets the idea to visit Helmut Zemo in prison who had been intensively studying the organization.

During his imprisonment within the Berlin Correctional Facility, Zemo received a visit from Bucky Barnes. Zemo had then apologized to Barnes, insisting that his actions in framing him for T'Chaka's murder had never been personal, while calling him a means to an end. Barnes changed the subject and told Zemo that someone had recreated the Super Soldier Serum which got Zemo's attention and believed that Barnes was desperate to have to have come for his assistance; much to Zemo's surprise, as he deduced that Barnes had assumed that it was HYDRA who was behind this, which was why he came to see him. Barnes them helped Zemo broke out of the prison.