This short story tells us who the perpetrators were that instigated and encouraged the riots in Cardiff. It identifies the 10 men arrested by the Police and found guilty in Swansea Court.  It shows us that these men were career criminals, not men who had lost their jobs because of Black men. A mob is an explosion but to continue that over a number of days requires the flames to be constantly fanned and these men were the constant spark.

The Black British Empire contributed significantly to World War 1, financially giving millions of pounds and also sending millions of soldiers. Soldiers from the West Indies and Africa being used as servant and menial labour. The British Army treated these soldiers in a directly racist manner, denying most of them the opportunity to fight because they did not want the Germans to despise them for needing savages to help them win the war; making the black soldiers dig toilets for white soldiers and prisoners and carry munitions to the front. The Black soldiers went on strike after finding that they were denied a pay rise because of their race, this resulting in firing squad and prison.

This is a timeline of the events in the UK in 1919 that were precursors to a potential revolution. Striking soldiers, strikes, the creation of an independent Ireland, mutinies and white mobs attacking black and minority people across the UK. 
The British Government were afraid of a Bolshevik uprising in 1919 in the UK and it very nearly happened.

The Race Riots in Wales in June 1919 started in Newport on the 6th June and despite crowds involving over a thousand white men and women, no-one was killed. Mary Ellen Sheedy (a white woman charged with riotous assembly) tried to set fire to a Boarding house and became the only woman in the mob to be charged during the riots in Wales.
The events in Newport have received little publicity in the last Century but the mob wreaked havoc in a very small part of Newport.
8 white men and 1 white woman were charged in Court, alongside 32 Black seaman.
The Black seaman had all served in World War One aboard the merchant ships, and some of them were to die in World War 2.

The Race Riots in Wales in June 1919 started in Newport on the 6th June but on the 11th June they started in Barry, Wales. This Docks town was the scene of the first death in the Riots when a seaman from the Caribbean stabbed a white local man during a fight. The fact that the white man (Frederick Longman) did nothing to stop the crowd violence that was to follow but there were no further deaths.
Charles Emmanuel went to prison for the killing of Longman.
This chapter of `secret' history is not taught in local schools.
The riots may have been a turning point for Black seaman and soldiers because despite the State trying to persuade them to accept repatriation (they were British Subjects and could not be officially be deported against their will) , they did not take the offer of a one way ticket home, the men and their white wives decided to stay and because of that their ancestors are Welsh citizens.

The British Soldiers were angry at not being demobilised but they were not the only ones. Canadian soldiers were also very angry at not being sent home and this anger led to at least 2 major riots. The first in Kinmel Bay in Wales and then in Epsom, Surrey where a police officer was killed.

When workers went on strike Belfast in 1919 it was within days of the declaration of an Irish Republic and 2 police constables being shot in an ambush. The workers brought Belfast to a complete halt cutting off electricity (although the kept hospitals supplied). The Government reacted by bringing in the army, placing machine guns at the electricity station and other vital infrastructure locations, breaking the strike.

Finally the soldiers were demobbed but they had little money, minimum job prospects, very bad housing conditions and wives who had changed because of war work. In the 1918 election these soldiers were promised new job, new housing and a bright new future. None of these things were available when they returned home and that made them angry as events proved.

In 1919 Glasgow workers called a General Strike, brought transport and commerce to a halt. The police attacked them but were repulsed in George Square and the Government reacted by bringing in the army. The streets being filled by soldiers and tanks, strikers leaders being arrested until the strike was broken.

An issue that caused significant worries for the British Government in 1918 and 1919. After they realised that the promise made by Prime Minister David Lloyd George that they would be demobilised extremely quickly after the war. This was one of the critical promises made in the 1918 General Election.  In 1919 there were over 50 soldiers mutinies and 100,000 soldiers refused to obey orders.