Original sentence: A subsequent Baloch separatist movement gained momentum during the 1960s, and amid consistent political disorder and instability at the federal level, the government ordered a military operation into the region in 1973, assisted by Iran, and inflicted heavy casualties on the separatists.Shortly after Pakistan's creation in 1947, the Pakistan Army had to subdue insurgents based in Kalat who rejected the King of Kalat's decision to accede to Pakistan.The Obama administration's former Af-Pak envoy, Richard Holbrooke, said that while Pakistan had repeatedly shared its allegations with Washington it had failed to provide any evidence to the United States that India was involved in separatist movements in Balochistan
Edited sentence: After the Khan of Kalat had been forced to agree to the accession of Kalat, a Baloch separatist movement was created by his brothers.Shortly after the partition of India and the creation of Pakistan in 1947, the Pakistan Army invaded Kalat, the central part of Balochistan, which rejected to accede to Pakistan.The Obama administration's former Af-Pak envoy, Richard Holbrooke, however said that while Pakistan had repeatedly shared its allegations with Washington it had failed to provide any evidence to the United States that India was involved in separatist movements in Balochistan.The movement gained momentum during the 1960s, and amid consistent political disorder and instability at the federal level, the government ordered a military operation into the region in 1973, assisted by Iran, and inflicted heavy casualties on the separatists