There are nine Para (SF) battalions and soldiers are selected accordingly. An example of this would be the 10 Para (SF) who are also known as Desert Scorpions. The probation period for this is six-month and the probationers are selected accordingly for desert warfare. The 9 Para (SF) who specialise in Mountain warfare go through a nine-month course at the Special Forces training centre in Nahan, Himachal Pradesh which is followed by further specialised selection. 1 Para specialises in mountain warfare. This concept of geographical specialisation was over time reduced and each Para (SF) battalion is trained to operate in various different terrains and climates.