House of the Dragon season 3 is about to kick off as we return to the ongoing civil war between the Targaryens, known as The Dance of the Dragons. Set 200 years before the events of Game of Thrones, this was a prolific time in Westeros and set the scene for how the Targaryen dynasty began to crumble. Starting when King Viserys was in power, the ambitious HBO prequel has so far focussed on how his line of succession caused a split in the household.
Long story short, he named his daughter Rhaenyra Targaryen as the heir to the Iron Thone but when he died, his second wife Alicent Hightower claimed he changed his mind and named their son, Aegon Targaryen, as the one true heir. This caused the dynasty to split into two sides, nicknamed the Greens and the Blacks.
