Since 1815, the German states had belonged to the German Confederation. Its territory was defined essentially after the
Holy Roman Empire. As a consequence, the two dominant member states belonged to the confederation only partially, leaving their vast territories such as the original
Prussia (renamed
East Prussia), the Prussian and Austrian shares of the partitioned Poland, or the Hungarian part of the Austrian Empire, outside of the Confederation. The territory within the confederation was called
bundeszugehörig (belonging to the confederation), the other
bundesfremd (foreign to the confederation). Only
Bundesgebiet (federal territory = territory within the boundaries of the confederation) was protected by the military provisions of the German Confederation. In
March 1848, revolution broke out in Germany and other European countries. The Federal Assembly, the only organ of the German Confederation, elected a
National Assembly to work out a constitution for a German federal state. The German National Assembly also installed a provisional head of state (the uncle of the Austrian Emperor) and government. Initially, it was universally accepted that the federal territory of Austria should be a part of the new German state. During the course of 1848, it became evident that the Austrian government was not willing to live with the consequences of a German federal state. The German National Assembly refused to accept all of Austria, as this would have burdened the new state with the nationality conflicts of Austria. Only the part of Austria that was already federal territory was welcome, even if it included a large ethnic minority (the
Czechs). The Hungarian part of the
Habsburg Monarchy would have had to be separate in terms of constitution, government and administration. The Austrian Emperor would have been the head of both parts, formed as separate states in a
personal union only. Austria rejected demands for such a division of its imperial territory, as it viewed a personal union as insufficient to ensure integrity of the monarchy. In March 1849, the Austrian Emperor issued a new Austrian constitution which defined Austria as a
centralist state. By then, the German National Assembly was already divided in 'Greater Germans' (often Catholics) and 'Lesser Germans'. The latter tendency became in March 1849 the majority. It voted for a
German constitution that left open the accession of Austria, but elected the Prussian king to be German Emperor. It also made for the first time a then-failed attempts to expand borders of the Confederation through inclusion of the original nucleus of Prussian statehood (
East Prussia), as well as through annexing into the Confederation the Prussian-ruled share of the dismembered Polish state, enjoying a degree of autonomy and consisting of
Pomerelia (renamed
West Prussia), the
Lauenburg and Bütow Land, as well as the
Greater Poland (renamed
Grand Duchy of Posen). Attempts to annex the territories populated with Poles were based on an assessment that future successful Germanisation of these lands would be feasible, in contrast to the Hungarian lands. The planned annexations elicited an immediate armed response of the Poles in the form of the
Greater Poland uprising (1848) and were as a result abandoned for the time being. In spite of their failure at the time, the assembly did succeed, however, in demoting the Grand Duchy to an ordinary
Province of Posen. In an unexpected turn of events, the Prussian king refused, however, to accept in April the offered crown of the nascent
German Empire (1848–1849), primarily due to his negative perception of the form of the planned empire as designed by the Frankfurt Constitution, thus causing abortion of the efforts to establish the state. Nevertheless, he followed in the immediate aftermath with further steps to unify Germany, but on his own
absolutist terms, initially through a project that was later called the '
Erfurt Union'. Austria was not invited to become part of this version of Lesser Germany.
Joseph von Radowitz, adviser to the Prussian king and actual leader of the project, tried to bind Austria and the Union together in a confederation. == Evolution after 1850 ==