Theoretical Outcomes: The Vale and Iron Islands Allying with Robb Stark

The Game of Thrones universe is full of complex political and military alliances. What if key factions like the Vale and the Iron Islands joined forces with Robb Stark? Let's explore the potential outcomes of such a scenario.

The Lannister Conundrum

Given that the Vale and the Iron Islands joined Robb immediately, the Lannister position would be tremendously weakened. Tywin Lannister's campaign in the Riverlands would be stalled, effectively turning the tide of the war. Tywin, understanding the strategic importance of holding onto Lannisport, would likely order Jaime to secure Riverrun while Tywin himself would have to move westward.

However, Tywin's efforts would be in vain. With the addition of the Vale cavalry, a force known for their superior tactics in the East, Tywin would face a catastrophic defeat. This outcome might be due to the significant mismatch between infantry and cavalry forces, making Tywin's strategic genius irrelevant in the face of superior tactical execution. Consequently, Tywin's westward march would be met with a thorough crushing by Robb Stark's combined forces, eliminating any hope of Lannister resurgence.

Stannis' Supremacy and Cersei's Downfall

While Tywin Lannister would face defeat west of the Riverlands, Stannis Baratheon's forces would be strengthened by the Iron Fleet's support. With Stannis successfully breaking through the gates of King's Landing, there would be a monumental battle against Cersei and Joffrey. This outcome not only leads to the demise of Lannister rule in King's Landing but sets the stage for a united front against the remaining Lannister and Tyrell factions.

Political Climate and Robb's Victory

As Tywin retreats and the Lannister forces falter, the political climate shifts dramatically. Robb Stark's victory ensures a strong foothold in King's Landing, potentially swaying the rival houses into submission. With the support of both the Iron Islands and the Vale, Robb could control vast resources, supply routes, and garrisons, making his position unassailable.

Moreover, the combined forces of the Stark, Arryn, and Ironborn would create a formidable alliance. Robb's military expertise would complement the strategic acumen of the Arryn's forces, while the Ironborn's naval presence would secure the Westerlands from repeated raids. This alliance would leave the Lannisters and Tyrells struggling to maintain their power amid constant military and political threats.

Alternative Scenarios: Divided Lannister Forces

Even if the Battle of the Green Fork still occurred, Lysa Arryn's decision to call banners could complicate Tywin's plans. Without a clear understanding of the Vale's forces, Tywin might have to retreat to Harrenhal or face a divided Lannister force. Robb's skirmishes could disrupt Tywin's operations, forcing him to confront a numerically superior and better-coordinated enemy.

If Tywin still moved westward, he would face significant challenges. Robb's army might not engage in full-scale battle, instead relying on hit-and-run tactics to delay and harass Tywin's forces. This protracted conflict would ultimately undermine Tywin's logistical support and morale, allowing Robb to carve out a strategic advantage.

Stannis' Triumph and the End of the Lannister Line

Assuming Stannis successfully takes King's Landing, he would have a significant advantage over the Lannister and Tyrell forces. The Lannisters, now bitterly divided and weakened, would have to contend with a superior military force led by Stannis. The inevitable outcome would be the destruction of the Lannister line, leaving Stannis in control of House Lannister's legacy holdings.

Conclusion: Robb Stark's Return to Winterfell

With victory secured, Robb Stark would have two key advantages. First, his soldiers would be battle-hardened, having fought numerous engagements against the Lannisters and their allies. Second, the Tyrells, now engaged in their own struggles for power, would not have the resources or manpower to counter Robb's forces effectively.

Upon returning to Winterfell, Robb would find a grand opportunity to consolidate his power. The political landscape would be radically different, with the Lannisters in disarray and the Tyrells preoccupied with internal conflicts. Robb's strategic position would allow him to consolidate power, ensuring a peaceful rule over the diminished Lannister territories.

In conclusion, the alliance between the Vale and the Iron Islands, combined with Robb Stark's superior military leadership, would lead to a decisive and unified victory for the Stark forces. This theoretical outcome not only highlights the complex interplay of power dynamics but also illustrates the importance of strategic alliances and military prowess in the tumultuous world of Westeros.