Brest's Atlantic position was a rational French choice, but the inland transport needed to sustain its fleet arrived much later than the defenses and dockyard. A base dependent on coastal shipping could find its own supplies interrupted by the enemy it was intended to threaten. Britain treated naval power as a geographic necessity and funded Plymouth, continuous supply, and the Western Squadron accordingly. France also faced the demands of continental war and did not make comparable supporting investment around Brest. The squadron's mission was to engage an emerging enemy fleet and defeat it, or damage it enough to prevent its operation. The later Channel Squadron inherited that continuing concern with French Atlantic bases.
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Brest and the Western Squadron’s strategic legacy
Brest remained strategically important, but British bases, supply, and a standing western force made its fleet a containment problem rather than an easy invasion tool.