Hundreds of police officers are stationed along the route in that area , with many more elsewhere in the city , as the Northern Ireland police service braces for possible trouble . Thousands of police are deployed in Belfast to prevent possible outbreaks of violence . The parade marks the centenary of the signing of the pro-union Ulster Covenant . Up to 30,000 people are expected to take part in the march . - March 24 :
Thousands of police are deployed in Belfast to prevent possible outbreaks of violence . The parade marks the centenary of the signing of the pro-union Ulster Covenant . Up to 30,000 people are expected to take part in the march . - March 24 :