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In writing the "Bellum Gallicum", Caesar often elides legal and administrative arrangements in favor of military narrative. The situation faced by Publius Crassus in Brittany involved both the prosaic matter of logistics (i.e., feeding the legion under his command) as well as diplomacy among multiple polities, much of which had to be conducted on initiative during Caesar's absence. The building of a Roman fleet on the Loire river during the winter of 57–56 BC has been interpreted by several modern scholars as preparation for an invasion of Britain, to which the Armoricans would have objected as a threat to their own trade relations with the island. Caesar, at any rate, is most expansive about the exciting naval battle that ensues from the crisis.