Final answer:
Colonial policy supported Bismarck's foreign policy aims by enhancing German prestige, offering trade opportunities, and strengthening Germany's position against other colonial powers; it also reinforced domestic unity and could be used as diplomatic leverage.
Step-by-step explanation:
The colonial policy supported Otto von Bismarck's foreign policy aims in several ways. Initially, Bismarck was skeptical about the value of colonies, but later recognized their potential to enhance German prestige and offer opportunities for trade and investment. Moreover, by acquiring colonies like Togoland and German East Africa, Bismarck aimed to strengthen Germany's international position and counteract the colonial dominance of other powers. This was in line with his broader Realpolitik strategy of pragmatic and adaptable foreign policy to elevate Prussia within Europe. Bismarck's successful unification of Germany also worked hand-in-hand with a colonial policy that aimed to unify and consolidate German interests, reflecting his focus on maintaining and increasing Prussia's power.
Through colonial expansion, Bismarck hoped to project German power, thereby supporting his foreign policy aimed at establishing German dominance in European affairs. The colonial ventures were a means of national cohesion and a tool in diplomacy, as territories could potentially be used as bargaining chips in negotiations with other colonial powers. The possession of colonies ultimately contributed to Germany's status as a growing global power at the end of the 19th century.