Victoria station, also known as London Victoria, is a central London railway terminus and connected London Underground station in Victoria, in the City of Westminster, managed by Network Rail. Named after the nearby Victoria Street (not the Queen), the main line station is a terminus of the Brighton Main Line to Gatwick Airport and Brighton and the Chatham Main Line to Ramsgate and Dover via Chatham. From the main lines, trains can connect to the Catford Loop Line, the Dartford Loop Line, and the Oxted line to East Grinstead and Uckfield. Southern operates most commuter and regional services to south London, Sussex and parts of east Surrey, while Southeastern operates trains to south-east London and Kent, alongside limited services operated by Thameslink. Gatwick Express trains run direct to Gatwick. The Underground station is on the Circle and District lines between Sloane Square and St James's Park, and the Victoria line between Pimlico and Green Park. The area around the station is an important interchange for other forms of transport: a local bus station is in the forecourt and Victoria Coach Station is nearby.

Victoria was built to serve both the Brighton and Chatham Main Lines, and has always had a "split" feel of being two separate stations. The Brighton station opened in 1860 with the Chatham station following two years later. It replaced a temporary terminus at Pimlico, and construction involved building the Grosvenor Bridge over the River Thames. It became immediately popular as a London terminus, causing delays and requiring upgrades and rebuilding. It was well known for luxury Pullman train services and continental boat-train trips, and became a focal point for soldiers during World War I.

Like other London termini, steam trains were phased out of Victoria by the 1960s, to be replaced by suburban electric and diesel multiple-unit services. Despite the end of international services following the opening of the Channel Tunnel, Victoria still remains an important London terminal station. The connected Underground station, in particular, suffered from overcrowding, until a major upgrade was completed in the late 2010s. The Gatwick Express service provides easy access between Central London and Gatwick Airport for international travellers.

The Irish Republican Army (IRA; Irish: Óglaigh na hÉireann), also known as the Provisional Irish Republican Army, and informally as the Provos, was an Irish republican paramilitary organisation that sought to end British rule in Northern Ireland, facilitate Irish reunification and bring about an independent, socialist republic encompassing all of Ireland. It was the most active republican paramilitary group during the Troubles. It saw itself as the army of the all-island Irish Republic and as the sole legitimate successor to the original IRA from the Irish War of Independence. It was designated a terrorist organisation in the United Kingdom and an illegal organisation in the Republic of Ireland, both of whose authority it rejected.

The Provisional IRA emerged in December 1969, due to a split within the previous incarnation of the IRA and the broader Irish republican movement. It was initially the minority faction in the split compared to the Official IRA, but became the dominant faction by 1972. The Troubles had begun shortly before when a largely Catholic, nonviolent civil rights campaign was met with violence from both Ulster loyalists and the Royal Ulster Constabulary (RUC), culminating in the August 1969 riots and deployment of British soldiers. The IRA initially focused on defence of Catholic areas, but it began an offensive campaign in 1970 that was aided by weapons supplied by Irish American sympathisers and Libyan leader Muammar Gaddafi. It used guerrilla tactics against the British Army and RUC in both rural and urban areas, and carried out a bombing campaign in Northern Ireland and England against military, political, and economic targets, and British military targets in Europe.

The Provisional IRA declared a final ceasefire in July 1997, after which its political wing Sinn Féin was admitted into multi-party peace talks on the future of Northern Ireland. These resulted in the 1998 Good Friday Agreement, and in 2005 the IRA formally ended its armed campaign and decommissioned its weapons under the supervision of the Independent International Commission on Decommissioning. Several splinter groups have been formed as a result of splits within the IRA, including the Continuity IRA and the Real IRA, both of which are still active in the dissident Irish republican campaign. The IRA's armed campaign, primarily in Northern Ireland but also in England and mainland Europe, killed over 1,700 people, including roughly 1,000 members of the British security forces, and 500–644 civilians. In addition 275–300 members of the IRA were killed during the conflict.