Protestant marching season is again igniting tensions in Northern Ireland, with clashes between Catholics and Protestants occurring in North Belfast last weekend after a march through predominantly Catholic areas. The biggest celebrations across Northern Ireland occur on July 12, the anniversary of a 17th century victory by Protestant forces and a source of deep resentment among Catholics. In recent years the worst July 12 conflict has occurred in Portadown. Follow local reports of planned parades and their routes and avoid any that will pass through Catholic neighborhoods.