Definition of nationalism:

Nationalism is an ideology and movement that promotes the interests of a particular nation especially with the aim of gaining and maintaining the nation's sovereignty over its homeland. Nationalism holds that each nation should govern itself, free from outside interference, that a nation is a natural and ideal basis for a polity, and that the nation is the only rightful source of political power. It further aims to build and maintain a single national identity-based on shared social characteristics such as culture, ethnicity, geographic location, language, politics, religion, traditions and belief in a shared singular history -and to promote national unity or solidarity. Nationalism, therefore, seeks to preserve and foster a nation's traditional culture, and cultural revivals have been associated with nationalist movements. It also encourages pride in national achievements, and is closely linked to patriotism. Nationalism is often combined with other ideologies, such as conservatism or socialism.

Nationalism is a way of thinking that says that some groups of humans, such as ethnic groups, should be free to rule themselves.

Explanation:

war never

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.