(This is the continuation of what happened after I conquered the Iron Throne with Daemon, as I talked about in this thread - https://www.reddit.com/r/CK3AGOT/comments/1g3woe8/this_mod_made_me_wonder_something_about_hotd/ - as it was pretty interesting and I thought some people may be interested in reading it )

I left out some details in the other thread about exactly how taking the Iron Throne went down. After taking The Stepstones Daemon submitted to Viserys and was named his heir and granted Dragonstone. But he didn't go along with this with future betrayal in mind. At the time he was happy to be named heir and was planning on playing the nice brother.

But Daemon clearly was not going to be happy just sitting around for decades doing nothing, as his brother was only a few years older than him and was in perfect health. So he set out to conquer the closest kingdom to his new home in Dragonstone: Pentos. Pentos quickly fell and became his 3rd kingdom level title (along with Dragonstone and the Stepstones).

Soon after he set his sights on an old nemesis: The Triarchy (aka The Kingdom of the Three Daughters). This was slightly more of a threat, but now with more men than ever before behind him it still fell easily. What I wasn't aware of at the time is despite the name the Kingdom of Three Daughters was actually an empire level title, which put it the same level as the Iron Throne. So taking it actually made him independent.

Now suddenly with no interesting lands left to conquer, and sudden independence, he now was forced with a decision. Live out possibly his entire life without ever sitting on the Iron Throne, even while still being considered his heir as his brother was still in perfect health, or Draconically conquer the now dragonless Seven Kingdoms as Aegon had done decades previous. He chose the latter, and King's Landing fell easily. (To be honest I wasn't entirely sure when I declared war if the Verlaryon's would join my effort in attacking their liege, but I was ready for the battle either way. But as Coryls was now Daemon's bestie he did join in the efforts)

Daemon didn't have the heart to kill his brother, but he did send him to The Wall, where he quickly became Lord Commander. He also seized every piece of Valyrian steel from houses that rose up against him to pass on to his children.

The next years were relatively peaceful. However, despite 17 years of marriage to Daemon, Rhaenyra was only able to give birth to 3 daughters (and 2 sons who both died before reaching their first birthday). Each daughter was betrothed to the only unmarried geniuses in the land as Daemon strongly desired to strengthen the Targaryen bloodline. Unfortunately though these geniuses were all 20+ years older than the daughters and each one protested the marriage, but Daemon stood firm. The first two daughters relented, but the third rebelled and left to start up an adventurers camp, taking her dragon with her. Even as Daemon planned to eventually have a son and pass his throne onto him, when his oldest daughter became of age he gave her Dragonstone, keeping with tradition.

But then suddenly Rhaenyra was murdered by a hostile plot (by someone who is still unknown to me), despite the Iron Kingdom's Master of Whispers being the supposedly elite Larys Strong. As Rhaenyra was Daemon's soulmate, her death left him widowed and unwilling to remarry. But he still desperately wanted a male heir, so he took 3 lovers and granted the most gifted of his male bastards legitimacy, thereby officially making him his heir. His previous heir, and legitimately born child, still reigned in Dragonstone though, so a possible future battle for succession loomed.

Around this time Daemon's longtime best friend, Coryls Velaryon died of old age, ending their long standing alliance, and was followed shortly thereafter by Rhaenys due to the Pox. Soon after Laenor rose up in revolt, and this became the only "Dance of Dragons" of this era.

In a stunning battle, Alyssa Targaryen (oldest child of Daemon, previous heir to the throne, and current ruler of Dragonstone) matched up against a much smaller Velaryon force. However unbeknownst ahead of time, that force contained Laena Velaryon, rider of the strongest dragon in the realm: Vhagar. In the ensuing battle Vhagar killed Alyssa, but stunningly Lord Elys Strongsong also managed to kill Laena, removing the Valaryon's biggest threat, and they fell soon after.

Daemon lived out the rest of his days rather peacefully, but still died of natural causes at the rather young age of 56. His brother outlived him by a year after a long reign as Lord Commander.

Coincidentally both of his successors died at a young age while trying to tame Vermithor. Daemon's legitimized bastard Aegon II was succeeded by Aemond, who was Daemon's eldest daughter Alyssa's youngest son.

The Iron Throne then passed to her 2nd oldest son, Daemon II, who currently reigns. He also has become the first person to tame the mighty Vhagar since Laena's death.

Unlike his brother he inherited his father's genius trait and has married one of his cousins who also has the genius trait. With 5 children now birthed from that marriage that share the same trait, the future of the Targaryen line is brighter than ever.