Why Heligoland breaks Germany's naval deterrence strategy

The German naval programme historically sought enough strength to make Britain hesitate before fighting. A campaign to recover British-held Heligoland removes that logic, because London cannot be expected to stand aside while Germany attacks its own fortified territory. Building longer-ranged coastal guns would also advertise offensive intent and give Britain a public justification for strengthening the island at lower marginal cost. The scenario therefore intensifies the German army-navy budget struggle: every extra resource devoted to cracking Heligoland competes with the army's continental requirements. Army leaders might instead favour accommodation with Britain, treating the fortress as protection against France and Russia rather than as an objective worth a ruinous naval war.