How does nationalism constitute military ideology?

Nationalism does not always constitute a military ideology although it does it is very often an integral part of an military ideology. Nationalism, if accepted as the belief that the nation is the most important block of human community and that the advancement of that nation above others is a commendable goal, could create support amongst the populace for militarization. However to conclude that nationalism constitutes a military ideology would be to oversimplify the complex and multi-faceted nature of ideology itself.

The existence of nationalism does not necessarily dictate the existence of a military ideology. For example, Japan has an extremely strong sense of nationalism supported by groupism; however due to historical context, cultural implication, strength of economic markets, and other countless unidentifiable factors Japan does not show the characteristics of military ideology.

Rather, it would be more accurate to state that nationalism is often used as the self-affirmation and source of righteousness in a military ideology.