An aristocrat from a distinguished family, Edward Ashford, begins the search for the Progenitor Virus.
The world famous multimillionaire Lord Ozwell E. Spencer requests architect George Trevor to design and build a mansion in the Arklay Mountains. [BH1]
Three people, Ozwell E. Spencer, Edward Ashford and biochemist James Marcus discover the Progenitor Virus which causes mutations in the genes of various organisms.
In the Arklay Mountains of the Raccoon City outskirts, the mansion (Spencer Mansion) and Arklay Laboratory are completed. The designer George Trevor is imprisoned for confidentiality, then dies in the mansion. [BH1]
At Ozwell E. Spencer's suggestion, Edward Ashford and James Marcus cooperate as three joint entrepreneurs to establish a company called the Umbrella Corporation. It was officially a pharmaceutical company, but it used the Progenitor Virus to develop B.O.W.s, and its true aim was to monopolize the military market.
Edward Ashford is infected with the Progenitor Virus and dies. His son Alexander takes over as head of the Ashford family. [CV]
The Umbrella executive training school is established in the Arklay Mountains. James Marcus is the first director. A laboratory is established alongside the training school, and James Marcus continues his research on the Progenitor Virus. [BH0]
Alexander Ashford constructs the South Pole Base. A secret underground laboratory is established for the top secret "CODE:Veronica" project. [CV]
The twins brother and sister Alfred and Alexia Ashford are produced by Alexander’s CODE:Veronica project. [CV]
Both Albert Wesker and William Birkin are assigned to the Umbrella executive training school as executive candidates.
By administering the Progenitor Virus to a leech, James Marcus succeeds in developing a new type of t-Virus. [BH0][BH1]
Ozwell E. Spencer schemes to steal James Marcus' research results and consequently, t-Virus research is taken over by the Arklay Laboratory. [BH1]
Alexia Ashford graduates from a famous university at the age of 10. Her ability is recognized and she becomes a chief researcher at the South Pole Laboratory. [CV]
Alexia Ashford incorporates the DNA of insects and plants with the Progenitor Virus, and succeeds in developing a new kind of virus namd t-Veronica. [CV]
Alexia Ashford injects the t-Veronica Virus to her own father Alexander. The experiment fails, making Alexander turn into a monster called Nosferatu. He is then announced missing to the public. [CV]
Alfred Ashford succeeds as the 7th head of the Ashford family. [CV]
Alexia Ashford administers herself the t-Veronica Virus. In order to perfectly fuse with the virus, she has herself put into cryogenic suspension for 15 years. To the public, she is announced to be dead due to infection by the virus. [CV]
At the order of Ozwell E. Spencer, Albert Wesker assassinates James Marcus, director of the Umbrella executive training school. t-Virus development becomes led by William Birkin, and the B.O.W. Tyrant is developed. [BH0]
The Umbrella Europe Sixth Laboratory sets the "Nemesis Project" in motion. Development begins on a new style B.O.W. which overcomes the faults of the Tyrant which is difficult to control. [BH3]
Umbrella begins planning construction of a huge laboratory beneath Raccoon City and William Birkin's "G-Virus Project" is approved by Ozwell E. Spencer and is set into motion. [BH2]
Albert Wesker transfers to the Intelligence Department. He begins to be more deeply concerned with the dark part of Umbrella.
South American drug lord Javier Hidalgo obtains the t-Virus from Umbrella. On February 25, Javier's wife Hilda was suffering from an incurable illness and the t-Virus was administered to her, but on May 20 the same year the virus goes out of control and she becomes a monster. [BHDC]
Alfred Ashford is inaugurated as the commander of the Umbrella base on Rockfort Island. [CV]
William Birkin transfers to the Raccoon City Underground Laboratory. He continues to conduct G-Virus research. [BH2]
Umbrella begins colluding with Raccoon Police Chief Brian Irons. [BH2]
The special operations force S.T.A.R.S. is established by the Raccoon City police. Albert Wesker is inaugurated as captain. [BH1]
An accident occurs in the executive training school and a large quantity of pollutants leak out.
A large-scale virus leak accident occurs in the Arklay Laboratory. The laboratory is completely destroyed. [BH1]
-May ~ July
After B.O.W.s and similar naturally infected creatures escape from the laboratory, victims and missing persons occur in succession in the Arklay Mountains. They come to be recognized as frequent bizarre murder cases.
S.T.A.R.S. Bravo Team is dispatched to investigate the bizarre murders and makes an emergency helicopter landing due to engine trouble. They investigate the Ecliptic Express and the abandoned Umbrella executive training school and are attacked by B.O.W.s. Afterwards, only some survivors arrive at the mansion. [BH0]
S.T.A.R.S. Alpha Team is dispatched to search for Bravo Team after communication is cut off. They are attacked by B.O.W.s and escape into the mansion, but are further threatened by B.O.W.s and virus infected people inside. Eventually the mansion and Arklay Laboratory which were invaded by the virus are blown up, and only a few members survived. [BH1]
Albert Wesker who was believed to have died, revives due to the effect of a new virus. He obtains the t-Virus and escapes from the mansion. [BHUC]
Chris Redfield, S.T.A.R.S. member and survivor of the mansion incident goes to Europe for the investigation to uncover the conspiracy of Umbrella.
Dr. William Birkin is attacked by the Umbrella Special Forces, and administers the G-Virus to himself. The doctor becomes the organic weapon "G", and annihilates the Special Forces, and on this occasion, the t-Virus from the laboratory leaks into the sewers. [BH2]
The t-Virus which leaked into the underground waterways is carried by rats and cockroaches and infects humans, and a biohazard occurs throughout Raccoon City. [BH2]
To rescue the civilians of Raccoon City, the private U.B.C.S. military force of Umbrella is deployed. They deal with the annihilation of the zombies like the Raccoon City police, but are completely destroyed and only a few are left. [BH3]
S.T.A.R.S. member Jill Valentine who was conducting a solo investigation in the city attempts to escape from the town. [BH3]
In the evening, newly appointed police officer Leon S. Kennedy arrives in Raccoon City. Around the same time, Chris Redfield's younger sister Claire worries about her older brother who cut off communication, and visits Raccoon City. The two join and aim to escape from the town. [BH2]
Leon S. Kennedy and Claire Redfield protect William Birkin's daughter Sherry, and successfully escape from Raccoon City with the help of the agent Ada Wong who infiltrated the town and faked her identity. [BH2]
Umbrella Special Forces survivor HUNK successfully obtains a G-Virus sample. He escapes from the town. Afterwards, the sample is handed to Umbrella. [BH2]
Although she was seriously injured and almost died, Ada Wong succeeds in acquiring the G-Virus and escapes from the town. The G-Virus is handed to her employer Albert Wesker. [BHUC]
The U.S. Army intervenes in the biohazard that spread throughout Raccoon City. Martial law is declared in the city.
Jill Valentine and U.B.C.S. survivor Carlos Oliveira escape from the town. [BH3]
The United States Government decides to execute the "Sterilization Operation". The missile strike on Raccoon City is performed at the president's order and the town disappears from the earth. [BH3]
Claire Redfield follows the clue of her older brother Chris, and infiltrates the Umbrella Paris Laboratory but is discovered, and is captured by Umbrella. [CV]
Claire Redfield is confined in the prison on Rockfort Island. At the same time a Special Forces led by Albert Wesker attacks the island. The t-Virus leaks throughout the island. [CV]
Claire Redfield meets a young man named Steve Burnside who was also imprisoned in the concentration camp and they are attacked by the director Alfred Ashford, but they cooperate and succeed in escaping from the island. However at this time, they arrive at the South Pole Base due to the auto-pilot of the seaplane they boarded. [CV]
Alexia Ashford is awakened from her cold sleep in the South Pole Base by her older brother Alfred. [CV]
Chris Redfield arrives at the South Pole Base to rescue his younger sister Claire. After an encounter with Albert Wesker he encounters the mutated Alexia Ashford. He defeats her and destroys the base. [CV]
Albert Wesker maneuvers secretly in the background, and takes advantage of the chaos in the South Pole Base and obtains t-Veronica. [CV]
In relation to the tragic event at Raccoon City, there has been a movement for Umbrella to take full responsibility; however, because of the "Sterilization Operation' all the evidence has been lost and the movement is suffering.
Albert Wesker comes into contact with the South American druglord Javier Hidalgo. The t-Veronica Virus which he obtained in the South Pole Base is given to Javier Hidalgo, who administers it to his daughter Manuela. [BHDC]
U.S. authorities acquire information that Javier Hidalgo has obtained a virus. Agent Leon S. Kennedy and U.S. Army Special Operations Command soldier Jack Krauser are sent to infiltrate. [BHDC]
Although he succeeded in preventing the bioterrorism of Javier Hidalgo, Jack Krauser is discharged from the military due to an injury during the operation. He is not heard from since. [BHDC]
The t-Virus is stolen from the Umbrella Paris branch development laboratory. [GS4]
The luxurious passenger liner "Spencer Rain" owned by Umbrella is seajacked and serves as a stage of bioterrorism using the stolen t-Virus. On the Spencer Rain, a secret B.O.W. auction was performed by Umbrella for a revival, but it loses many valuable samples and customers due to this terrorism. [GS4]
The Private Anti-Bioterrorism Unit which Chris Redfield and Jill Valentine belong to receives infromation that the Russian branch of Umbrella is developing new B.O.W.s and infiltrates the plant. [BHUC]
At the same time as Chris Redfield and Jill Valentine, Albert Wesker sneaks into the Russian branch facility to obtain the top secret data from the main computer "U.M.F.-013". Afterwards, he leaks information to the prosecution which filed the lawsuit against the Umbrella Corporation. [BHUC]
Concerning the biohazard in Raccoon City, and its subsequent destruction, a business suspension order is issued to the Umbrella Corporation by the government. As a result Umbrella's stock plummeted around the world, and the Umbrella Corporation virtually collapsed. At this time, CEO Lord Ozwell Spencer disappears. He disappears to evade responsibility and afterwards, becomes missing.
The President's daughter Ashley Graham is kidnapped, and Leon S. Kennedy visits the European mountain village for the rescue. Then, he is involved in the incident involving the Plaga parasite. In the middle, he meets Ada Wong and Jack Krauser again. [BH4]
The Plaga sample taken by Jack Krauser ends up in the hands of his employer Albert Wesker. [BH4]
2004 and hereafter
With the collapse of Umbrella, biological weapons are passed to the hands of terrorists around the world and come to be abused in regional conflicts. [BH5]
In the airport of the American Midwestern town of Harvardville, a large-scale bioterrorism event occurs. Leon S. Kennedy is dispatched to resolve the incident, where he has a reunion with NGO member Claire Redfield who is involved with the incident. [BHD]
The bioterrorism countermeasure unit "BSAA" organized by the Global Pharmaceutical Consortium becomes an organization under the direct control of the United Nations.
Chris Redfield and Jill Valentine infiltrate the Spencer Estate. A fight with Albert Wesker occurs, and Jill protects Chris and falls off the cliff. They are not able to find her corpse or lost articles, and she is officially declared deceased on November 23. [BH5]
Chris Redfield who became a BSAA member confronts bioterrorism in the Kijuju autonomous zone in Africa. [BH5]