On "Commodore Rock", there are three different sources mixed: an old revolutionary song + some text from a song for children + the Bulgarian national anthem.
The parts with "High blue mountains / And you are my precious Motherland / You are heaven on Earth" are clearly inspired by Mila Rodino, The Bulgarian anthem: http://en.wikipedia.org/wiki/Mila_Rodino
The parts with Simeon (e.g. "Here comes Simeon / With his army") are from an old revolutionary song.
The parts with Vaksa ("Come on Vaksa, come on / We should eat again") are probably from an old song for children.
On "Commodore Rock", there are three different sources mixed: an old revolutionary song + some text from a song for children + the Bulgarian national anthem.
The parts with "High blue mountains / And you are my precious Motherland / You are heaven on Earth" are clearly inspired by Mila Rodino, The Bulgarian anthem: http://en.wikipedia.org/wiki/Mila_Rodino
The parts with Simeon (e.g. "Here comes Simeon / With his army") are from an old revolutionary song.
The parts with Vaksa ("Come on Vaksa, come on / We should eat again") are probably from an old song for children.
Radetski is an old Bulgarian steamship: http://bulgariatravel.org/en/object/138/Muzej_parahod_Radecki