Final answer:
In 1848, the issue with Schleswig-Holstein was a part of the larger German nationalist movement for unification, which ultimately failed to establish a united Germany at that time.
Step-by-step explanation:
In 1848, the issue with Schleswig-Holstein was a part of the larger German nationalist movement for unification. The Frankfurt Assembly, the first freely elected German parliament, attempted to draft a constitution to unite Germany as an empire. However, the revolution failed, and the kings of Prussia and Austria rejected the constitution, resulting in the continuation of a fragmented German Confederation.