In Jain Dharma, ahimsa (non-violence) is the highest principle. A devout Jain seeks to minimize harm to all living beings in thoughts, words, and deeds. Because being a soldier inherently involves causing harm, it is generally considered incompatible with the ideal of strict non-violence.

That said, there are nuanced views:

• Some lay Jains living in the world may pursue roles that protect and defend without causing unnecessary harm, always aiming to minimize injury and follow dharmic restraint.
• The two major Jain traditions (Digambar and Śvetāmbara) have nuanced discussions on dharma in the context of violence and self-defense, and historical examples exist where Jains served in broader societal roles while striving to uphold non-violence as far as possible.

If you’re exploring this for personal vocational choices, it’s best to consult with a knowledgeable Jain teacher or elder who can offer guidance aligned with your specific tradition and local community.

You can read more about related principles here