Final answer:
Hildebrand describes Bismarck's foreign policy as focused on strengthening Prussia and expanding German power through decisive wars and realpolitik strategies.
Step-by-step explanation:
Bismarck's foreign policy was described by Hildebrand as primarily focused on strengthening the power and interests of Protestant Prussia, rather than promoting national unity. Bismarck prioritized military spending and used a strategy of realpolitik, which emphasized pragmatism and practicality over ideology and moral considerations. He pursued a series of decisive wars with Austria, Denmark, and France to expand German power, excluding Catholic Austria from German affairs and acquiring various territories. His efforts ultimately led to the formation of a unified Germany.