The Expanse Codexery

Earth-Mars Coalition

Earth, Mars, and the Belt united against the Free Navy in a desperate bid to reclaim the Ring Gates.

Three months after the Free Navy attacked the Solar System, Earth and Mars moved past their historic rivalry to form a unified front against Marco Inaros. Following the Azure Dragon's devastating asteroid strikes on Earth, acting UN Secretary Chrisjen Avasarala coordinated with Martian forces to disable the threat. This collaboration culminated in Fred Johnson calling a meeting of all non-Free Navy OPA factions, where Holden convinced the heads of Earth, Mars, and the OPA to form a combined fleet. The resulting offensive launched simultaneously across the Solar System, marking the first time these former enemies acted as a single military entity to retake Medina Station and protect humanity.

Primary Members
United Nations (Earth), Martian Congressional Republic, OPA factions
Nature of Alliance
Military Coalition formed to defeat the Free Navy

Lore & Background

The alliance solidified when Avasarala informed James Holden that Earth had identified the Azure Dragon as the source of asteroid attacks. Bobbie Draper was sent along with the Rocinante crew as mission commander, successfully disabling the enemy ship and returning its crew as prisoners to Luna. With the immediate rock strike threat averted, Avasarala planned a major offensive to retake Ceres from the Free Navy, though Marco Inaros had already evacuated the station. When Fred Johnson convened a meeting of OPA factions that refused to join the Free Navy, Holden led the discussions after Johnson died of a stroke during high-G maneuvers. The heads of Earth, Mars, and the remaining OPA agreed to form a combined fleet. This consolidated force included Michio Pa's pirate fleet, which had betrayed Marco Inaros to redistribute supplies to Belt colonies. The plan targeted Medina Station as the most strategically important military objective, using a massive distraction across the system while the Rocinante escorted thousands of unmanned craft on the ice hauler 'Giambattista' to overwhelm the rail guns in the Slow Zone.

In Their Own Story

The offensive distracted the Free Navy as planned, but the consolidated fleet suffered heavy losses and Michio Pa's fleet was crippled. While the Rocinante reached the Ring, Bobbie Draper's force, led by her command, found themselves surprised by Duarte's marines defending the rail guns. Unable to take control of the weapons, Bobbie destroyed the nuclear reactor powering them instead. Although Medina Station surrendered to the Rocinante, it was left completely undefended from a counterattack by Marco Inaros, who ordered the rest of the Free Navy to travel under heavy burn to retake the station. Naomi Nagata analyzed data on disappearing colony ships and determined that when a certain threshold of mass passed through a gate followed closely by another ship, that second ship would vanish. In a desperate final attempt, the Coalition sent the right amount of mass through the Ring, timing it so Marco's ships disappeared upon entry, leaving him and the Free Navy to some unknown fate.

Reader's Guide

The Earth-Mars-Opa coalition operates as a combined fleet formed specifically to defeat the Free Navy. Key components include the Rocinante crew (Holden, Naomi, Alex, Amos, Clarissa Mao, and Bobbie Draper), the political leadership of Chrisjen Avasarala on Luna, and the military support of Michio Pa's former pirate fleet. The strategy relies on a two-pronged approach: a massive distraction across the Solar System to draw Free Navy attention, while a specialized unit uses the ice hauler 'Giambattista' to deploy unmanned craft against Medina Station's defenses. Success depends on precise timing and mass thresholds at the Ring Gates to neutralize enemy reinforcements.

Did You Know?

More in Factions & Organizations

Related in The Expanse

Links follow this subject's own source article.

Elsewhere in the The Expanse universe

Spotted an error? Know more?

This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record

Comments

Loading…
Open in the interactive codex →