The theory of "N-deterrence" has been frequently being interpreted by the various government-in-time of effect of Pakistan. Although the nuclear deterrence theory was officially adopted in 1998 as part of Pakistan's defence theory, on the other hand, the theory has had been interpreted by the government since in 1972. The relative weakness in defence warfare is highlighted in Pakistan's nuclear posture, which Pakistan considers its primary deterrent from Indian conventional offensives or nuclear attack. Nuclear theorist Brigadier-General Feroz Hassan Khan adds: "The Pakistani situation is akin to NATO's position in the Cold War. There are geographic gaps and corridors similar to those that existed in Europe ... that are vulnerable to exploitation by mechanized Indian forces ... With its relatively smaller conventional force, and lacking adequate technical means, especially in early warning and surveillance, Pakistan relies on a more proactive nuclear defensive policy."