The British Army was deployed to restore order on 14 August, beginning the 37-year Operation Banner, and peace lines were built to separate Catholic and Protestant districts. The Republic of Ireland's government set up field hospitals and refugee centres near the border, and called for a United Nations peacekeeping force to be sent to Northern Ireland. The British government held an inquiry into the riots, and the reserve police force was disbanded. The riots led to the formation of the Provisional Irish Republican Army and the growth of loyalist paramilitaries.