Wikipedia
Veerashaivism is a form of Shaivism sect of Hinduism. It is predominantly found in the states of Karnataka, Maharashtra and Andhra Pradesh. Veerashaivas are also found in other states: Tamil Nadu, Kerala, Madhya Pradesh, Uttar Pradesh and Gujarat and around the world.
Veerashaivism is enshrined or enhansed in the Shivagams. The complete philosophy of Veerashaivism is explained in Siddhanta Shikhamani.
The terms Veerashaivism and Lingayatism, a Shaivite denomination which also includes wearing Ishtalinga as a significant ritual of observance, have been used synonymosly, both by public and recognized by Governments, though validity of its correctness is the biggest contemporary theological and historical debate related to Lingayatism and Veerashaivism.