Border Coverage is the complete distance of shared borders for a given nation in the GFP formula. Border coverage is considered an important factor as it can influence alliances and reflects incoming/outgoing traffic and commerce capabilities. In times of war, borders become increasingly crucial in homeland defense. As such, longer-spanning borders are a natural hinderance for a given defending power.
Island-nations, such as Australia, are not penalized for lacking shared borders but are penalized for lengthy coastlines.
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