Complex sentence: Indigenous and foreign militant groups besides pro-India renegade militants proliferate through the 1990s with an estimated half a million Indian security forces deployed in the Kashmir Valley since the 1990s with increasing violence and human right violations by all sides leading to tens of thousands of civilian casualties.
Split into simpler sentences: Indigenous and foreign militant groups besides pro-India renegade militants proliferated through the 1990s with an estimated half a million Indian security forces deployed in the Kashmir Valley. Increasing violence and human right violations by all sides led to tens of thousands of civilian casualties.