Pakistan and India have had a long history of rivalry and conflict since partition in 1947. Their relationship is defined by their dispute over Kashmir and have fought three major wars over the region. Kashmir remains divided between the two countries with neither recognizing the other's claim. Other points of tension include border clashes, nuclear development, and accusations of supporting separatists in each other's countries. While periods of improved relations and peace talks have occurred, deep distrust and the Kashmir issue have prevented lasting reconciliation between the two nuclear powers.