As radiosaurs were not initially prepared to fight in the vacuum of space, the Lunar Marines managed to hold out against their opponents far longer than another other federated human force. Their ability to conduct unmolested ICBM strikes against radiosaur military assets and positions was a valuable asset to the human resistance efforts, notably during the Battle of Butte, but as soon as the Lunar Expeditionary Force was able to push portals up to the moon’s surface they were quickly overwhelmed.

Human folklore maintains that the Lunar Marines were not destroyed as the government would have them believe, but instead they retreated into bases carved deep within the moon, supporting a government in exile, gathering their strength, and waiting for the right moment to strike back.