Which motto reflects the amphibious nature of the Royal Marines?

The motto "Per Mare, Per Terram," which translates to "By Sea, By Land," encapsulates the amphibious nature of the Royal Marines, emphasizing their unique operational capability to conduct missions on both water and land. This reflects the versatility and adaptability of the Royal Marines, who are trained to operate in various environments, often launching assaults from the sea and continuing operations on land.

This dual capability is core to the Royal Marines’ identity and operational philosophy, as they are frequently required to engage in amphibious warfare, which combines naval and ground tactics. The motto highlights this essential element of their role, showcasing their readiness to tackle challenges presented by both domains in military operations.

The other options, while meaningful in their own contexts, do not specifically convey the amphibious aspect central to the Royal Marines' operations. For instance, "Semper Fi" is famously associated with the U.S. Marine Corps and signifies loyalty, while "Fortis et Libertas," meaning "Bravery and Freedom," speaks more to courage and values rather than operational capability. "Duty First" reflects commitment but does not encapsulate the unique amphibious operational focus of the Royal Marines.