How are nationalism and alliances linked?

Nationalism and alliances are linked as nationalism often fuels the desire for countries to assert their identity and interests, leading them to form alliances with like-minded nations. These alliances can be driven by shared national interests, cultural ties, or mutual defense agreements, reinforcing national unity. Conversely, competing nationalisms can also create tensions, prompting countries to seek alliances for protection against perceived threats. Thus, nationalism can both inspire cooperation and exacerbate conflicts among nations.