Complex sentence: India and Pakistan have fought at least three wars over Kashmir, including the Indo-Pakistani Wars of 1947,1965 and 1999 and since 1984 the two countries have also been involved in several skirmishes over control of the Siachen Glacier.
Split into simpler sentences: India and Pakistan have fought at least three wars over Kashmir, including the Indo-Pakistani Wars of 1947,1965 and 1999. Furthermore, since 1984 the two countries have also been involved in several skirmishes over control of the Siachen Glacier.