Parts of the sentence- ellipse clause

There are a series of conflicts that run throughout this story, the most important being Trujillo’s abuse of his dictatorship over the country; an external conflict between Trujillo and society.

Could you please tell me what this sentence is made up of in terms of phrases and clauses. Thanks.

the most important being Trujillo’s abuse of his dictatorship over the country= Is this an ellipse clause? The most important (conflict) being Trujillo's abuse of his dictatorship over the country. Is this now an independent clause if I insert the bracketed word?

Is the first comma incorrect? Or is what follows the comma a phrase? If it is, or were, an ellipse clause would a comma be incorrect the same way it would be if a comma joined two main clauses?

;an external conflict between Trujillo and society=is this an ellipse clause? (it is an external conflict between...)

I didn't write this sentence, so I don't need to know how to improve the sentence.

Thanks a lot!