Lashkar e-Tayyiba (LeT) is an insurgency focused on Kashmir, using terrorism, which increasingly operates in India, Central Asia, and Chechnya. It is suspected as the sponsor of the 2008 Mumbai attacks. The name variously translates as Army of Righteous, Army of the Pure, or Army Of The Pure And Righteous; other transliterations include Lashkar-e-Toiba and Lashkar-i-taiba. It is also known as
- Al Mansooreen / Al Mansoorian
- Markaz-ud-Dawa-wal-Irshad (MDI)
- Jamaat-ud-Dawa / Idara Khidmat-e-Khalq (IKK)
Established in the 1990s, is the military wing of Markaz-ud-Dawa-wal-Irshad (MDI) — a Sunni anti-US missionary organization formed in the 1980s to oppose the Soviets in Afghanistan. It is led by Abdul Wahid Kashmiri and is one of the three largest and best-trained groups fighting in Kashmir against India; it is not connected to a political party. Elements of LT and Jaish-e-Mohammed combined with other groups to mount attacks as "The Save Kashmir Movement." David Kilcullen considers it a regional transnational insurgency similar to Jemaah Islamiya rather than a worldwide organization such as al-Qaeda. 
In 2001, the United States declared it a terrorist organization and froze its assets. It has also been so declared by UN Security Council Resolution 1267 on May 2, 2005. To avoid some of the sanctions, it renamed itself Jamaat-ud-Dawa (JUD), which, in turn, created Idara Khidmat-e-Khalq (IKK) "as a public welfare organization that it utilizes to collect funds and undertake other activities." These were added to the US terrorist organization list in 2008. LeT was banned and its assets were frozen by the Pakistani Government in January 2002. JUD is on the Pakistani "watch list".  It is outlawed in India and Britain.
According to one of its documents, Why are we waging jihad, it goes beyond the issues of Jammu and Kashmir. It seeks restoration of Islamic rule over of India, and a union of Muslim majority regions in the area, including Chechnya and Central Asia.