Which happened first? Victor Emmanuel fought for national unity of Italy. The nation-states of Greece, Serbia, Bulgaria, and Romania were formed as a result of the breakup of the Ottoman Empire. Wilson promoted the principle of national self-determination. Feudal lords and the Catholic church lost power when monarchs began to consolidate political power.

Feudal lords and the Catholic church lost power when monarchs began to consolidate political power.

Victor Emmanuel fought for national unity of Italy.

The nation-states of Greece, Serbia, Bulgaria, and Romania were formed as a result of the breakup of the Ottoman Empire.

Wilson promoted the principle of national self-determination.

Explanation:

Feudal lords and the Catholic church lost its power on 9 February 1849 when a new assembly was formed in Roman republic. On 18 February 1861, Victor Emmanuel gather the disputes of the parliament of Italy and the Parliament announced Victor Emmanuel as King of Italy. In 1878,  Greece, Serbia, Bulgaria, and Romania got independence from Ottoman empire. Wilson presented the concept of self determination during first world war which was started in 1914 and ended 1918.

why was the national assembly formed by the third estate?

the estates-general had not been assembled since 1614, and its deputies drew up long lists of grievances and called for sweeping political and social reforms. the third estate, which had the most representatives, declared itself the national assembly and took an oath to force a new constitution on the king.