: The "Mad King" Aerys II Targaryen executed Lyanna's father and brother, prompting Eddard "Ned" Stark and Robert Baratheon to lead a rebellion.
The current state of Westeros was forged 15 years before the series begins during a civil war known as Robert’s Rebellion . Game of Thrones: The Story So Far
: After Robert's sudden death, Ned is betrayed and executed for treason by the boy-king Joffrey, sparking a widespread civil war known as the War of the Five Kings. 3. The War of the Five Kings : The "Mad King" Aerys II Targaryen executed
With the Iron Throne in question, multiple factions vie for control: the first in over a century.
: After Drogo and Viserys die, Daenerys steps into a funeral pyre with three petrified eggs and emerges with three live dragons , the first in over a century.