What is the On-To-Ottawa Trek?

To sum up the On-To-Ottawa Trek and the Regina Riot:

In the ealry 1930's relief, work camps were created by Prime Minister R.B Bennet but were not enough to deal with people's major economic problems. In June of 1935, after strking in Vancouver for a month the workers lead by the Relief Camp Workers Union boarded trains in Vancouver bound for Ottawa because they weren't getting enough pay.
The train was stopped in Regina by the RCMP. Two weeks later was the start of the "Regina Riot" Using baseball bats, billy clubs, and tear gas, the RCMP and Regina City Police fought a crowd of mainly citizens for three hours. Dozens of protestors were injured and one police officer was killed.