Perhaps most decisive though in the BJP's campaign was the solid alliance it had cultivated and the relatively strong performance it was able to deliver on regional and local issues. The 1991, 1996, and 1998 elections saw a period of consistent growth for the BJP and its allies, based primarily on political expansions in terms of cultivating stronger and broader alliances with other previously unaffiliated parties; and regional expansion which had seen the NDA become competitive and even the largest vote takers in previously Congress dominated areas such as Orissa, Andhra Pradesh and Assam. These final factors were to prove decisive in the election outcome of 1999.