Would an invasion/revolution combo work?

Me and my friends have a huge world building project, the whole scope of it would be impossible to explain without several hundred screenshots of discord convos and pictures of notebooks. To summarize everyone is responsible for a fictional country and can make stories about it and how the nations interact with each other. Obviously my country was communist, I called it 'Antegria' (before playing Papers, Please and being like ). I was getting bored of being a good country, so I had my country get couped and became a theocratic empire, and transition to a capitalist economy. This had pretty devastating effects on the people, and very many became poor. One bit of the story I wanted to make is a majority of class-conscious communists in the government, military, and general population fleeing persecution (the junta was killing suspected communists) to another communist country, the Communist Union of Benteria (which is kinda like if west germany and the DDR were both communist, and then unified). The government were very sympathetic to the fleeing communists and gave them a large empty bit of land to make a semi-autonomous commune. Over time, the commune grew enough to the point where 15-16,000 people occupied it, and they started to make a plan to take over the empire in a cuban revolution-esque plan. So a large force travels to a very rural part of the old country, and brings food and healthcare to the farmers and miners, who desperately need it as the austerity and privatisation had put a lot of them out of jobs (many had jobs in nearby cities, as the gov. ran high-speed trains between cities, but when the new government privatised the rail industries, it became prohibitively expensive to travel by train). By doing this across many rural areas they grow slightly in numbers and declare a few rural towns to be Antegria proper, and the junta's new government to be fraudulent. Is this in any way realistic or practical? Or really a way that a revolution could even happen?