What was the provision of the General Service Enlistment Act which was resented by the Indian soldiers? Why was it resented?

According to the traditional belief, it was a taboo for a Brahmin to cross the seas. As per the General Service Enlistment Act of 1856, Indian soldiers could be sent overseas on duty. The Act did not take into account the sentiment of the Indian soldiers. The Brahmin soldiers saw in this a danger to their caste. This led to the feeling of resentment among them.