5. Daemon Targaryen & Laena Velaryon
On paper, this match was a powerhouse. The volatile prince marries the dragon-riding daughter of the richest house in the realm. The strategic goal? For Daemon, it was a way to gain a powerful seat, a massive dragon, and stay relevant after being exiled
(again). For Corlys Velaryon, it was a way to finally get a Targaryen prince for his daughter. The problem is, the strategy ended there. Instead of leveraging their union in Westeros, the couple flew off to Pentos to live as wealthy, beautiful, and politically inert celebrities. The marriage itself wasn't a disaster—they seemed genuinely fond of each other—but as a strategic play, it was a punt. It produced heirs but achieved zero political momentum, making it a fizzle rather than a bang.
4. Rhaenyra Targaryen & Laenor Velaryon
This was the ultimate “fix-it” marriage, and like most quick fixes, the cracks showed immediately. The strategy was clear: unite the claims of the Targaryen heir with the might of the Velaryon fleet, silencing questions about Rhaenyra’s gender and Laenor’s… well, you know. The disaster wasn't the plan, but the execution. The entire court knew about their “arrangement,” and their open secret became a source of constant tension. The wedding feast itself ended in murder. Worse, it produced three children who so obviously weren't Laenor's that the word “strong” became a declaration of war. This union didn't silence whispers; it gave them a megaphone, creating a permanent, festering wound in the princess's claim to the throne.
3. Aegon II Targaryen & Helaena Targaryen
Ah, the classic Targaryen move: when in doubt, marry your sibling. The strategy here was purely about consolidation. By marrying his eldest son Aegon to his daughter Helaena, Viserys (or more likely, Alicent and Otto) aimed to keep power tightly coiled within their own branch of the family. There would be no pesky new in-laws with their own ambitions. The strategic disaster is twofold. First, it created no new alliances. While Rhaenyra was uniting with the Velaryons, the Greens were simply talking to themselves in an echo chamber. Second, it yoked the gentle, dragon-dreaming Helaena to a debauched and uninterested drunk. This wasn't a power couple; it was a tragedy waiting to happen, ensuring the Green faction was led by a man with no desire to rule and a wife he didn't respect.
2. Rhaenyra Targaryen & Daemon Targaryen
If Rhaenyra's first marriage was a political bandage, her second was a declaration of war. After faking Laenor’s death, Rhaenyra and her uncle Daemon married immediately. Was it for love? Probably. Was it for power? Absolutely. The strategy was to create an unassailable Targaryen-on-Targaryen power couple, two dragon riders united to defend the line of succession. But this was a strategic nuclear option. By marrying her notorious rogue uncle—and so soon after her husband's “death”—Rhaenyra torched any remaining goodwill from the court. She confirmed every rumor the Greens had ever spread about her and made reconciliation impossible. This wasn't a move to secure the throne; it was a move that dared her rivals to try and take it. It drew a final, bloody line in the sand.
1. Viserys I Targaryen & Alicent Hightower
This is it. The one. The original sin from which all other calamities in the show spring. After his wife Aemma's death, King Viserys needed a new queen. The strategically sound choice was Laena Velaryon, uniting the crown with its most powerful vassal. Instead, swayed by the counsel of her ambitious father Otto and his own lonely grief, Viserys chose Alicent Hightower. It wasn't just a suboptimal choice; it was a catastrophic one. It alienated the Velaryons, empowered the Hightowers, and, most importantly, created a second, competing royal family within the Red Keep. This single marriage split the House of the Dragon in two. Every subsequent disaster—the Greens vs. the Blacks, the disputed succession, the dead children—can be traced directly back to this one fateful, strategically bankrupt decision made by a sad king and a clever girl.
