In 1999, less than one year after both countries tested nuclear weapons, India and Pakistan found themselves locked in another armed conflict. In spite of a ray of hope for peace in February 1999, when the Indian Prime Minister, A.B. Vajpayee, visited Pakistan and signed the Lahore declaration, by April 1999, the two countries were effectively at war. From the prospect of improved relations and a chance for a peaceful resolution of differences, within one month the subcontinent was plunged into another war. In a brilliant tactical plan, Pakistan launched Operation Badr which saw a brigade sized force of Pakistan Army troops and Islamist militants infiltrate into Indian controlled territory. Supported by Pakistani artillery and well provided with small arms, mortars, and anti-aircraft weapons, these infiltrators were able to entrench along ridgelines with commanding positions over Indian lines of supply and communications. Once realizing the seriousness of the situation, the Indian government ordered its armed forces into a ponderous, but ultimately successful effort to evict the invaders. Facing treacherous terrain, and a well-supplied and entrenched enemy, the Indian Army troops supported by artillery and air force clawed their way up mountain heights to capture fortified enemy positions.