Due to the unstable government of Pakistan, its army had to become the core of its nation. His army also intervened and took control of the government to get rid of corrupt leaders. During the Soviet invasion of Afghanistan in the 1980s, more than three million Afghans fled to Pakistan. This led to Pakistan covertly providing military support to the Mujahideen, while at the same time receiving aid from the United States. Since the start of the war on terror, Pakistan has played a significant role in attempting to target the Taliban rulers of neighboring Afghanistan. This has had an impact on the tribal areas bordering Afghanistan, as Taliban fighters seek refuge in Pakistan in an attempt to escape drone strikes, which eventually follow them to Pakistan and complicate relations with local tribes and their government. Pakistan is also on the brink of war with India due to guerrilla tactics used by Muslim militants to disrupt India. The war on terrorism has resulted in the deaths of more than 50,000 civilians and many casualties. The military also suffered many casualties in the War on Terror, more than any other war.