June Revolution

The June Revolution, also known as the Minean Democracy Revolution, was a series of nonviolent protests and political events that took place in the Miners Republic from late April to early June 2053, culminating on June 5 where the Communist Party of the Miners Republic announced it would dismantle the single-party system and reform the government to accommodate a parliamentary system. It occurred during the Fall of Communism in the late 2040s and early 2050s.
Even with the revolution resulting in a change of parliamentary system and the fall of the Marxist-Leninist single-party state, the Communist Party retained control of the government in the subsequent election and has continued to do so, albeit at a heavily decreased amount of power.