Law of Neutrality
Rules governing the rights and duties of states that remain neutral during armed conflicts between other states.
Updated April 23, 2026
How It Works in Practice
The Law of Neutrality governs how states that choose not to participate in armed conflicts between other nations must behave. When a state declares neutrality, it commits to abstaining from supporting any belligerent party militarily or politically. This means not allowing their territory to be used for military operations, not supplying weapons or troops, and refraining from actions that could be interpreted as favoring one side. Neutral states must also prevent their citizens from engaging in hostilities from their territory.
Neutrality imposes duties to respect the sovereignty and rights of all belligerents equally. For example, neutral states may intern foreign troops who enter their territory to prevent them from rejoining the conflict. They must also allow free passage of humanitarian aid and refrain from acts that could escalate the war or draw them into it.
Why It Matters
Neutrality is crucial to maintaining some level of order and predictability during international conflicts. Without rules governing neutrality, conflicts could easily spread as more states become involved, destabilizing entire regions. The Law of Neutrality helps limit the scope of wars by protecting states that choose to stay out of hostilities, preserving their sovereignty and preventing unnecessary escalation.
Furthermore, neutrality can be a strategic choice for states wishing to avoid the costs and risks of war while maintaining diplomatic relations with all parties. It also provides a legal framework that protects neutral states from retaliation or punishment by belligerents, as long as they comply with their obligations.
Law of Neutrality vs. Non-Intervention
While both concepts relate to abstaining from conflict, the Law of Neutrality specifically applies during armed conflicts and involves active duties to remain impartial and refrain from aiding any belligerent. Non-intervention is a broader principle that prohibits states from interfering in the internal affairs of others, regardless of whether a conflict is ongoing.
In other words, neutrality is a specialized legal status during wars, whereas non-intervention is a general principle of international relations. A state can be non-interventionist without declaring neutrality if there is no armed conflict.
Real-World Examples
During both World Wars, several countries such as Switzerland and Sweden declared neutrality and adhered strictly to the Law of Neutrality. Switzerland, for instance, maintained its neutrality by controlling its borders, interning foreign soldiers who crossed into its territory, and refusing to provide military assistance to any side.
Another example is during the Gulf War in 1990-1991, where some states declared neutrality by avoiding participation in the coalition forces while continuing diplomatic relations with all involved parties.
Common Misconceptions
One common misconception is that neutrality means passivity or inaction. In reality, neutral states have active responsibilities to enforce their neutrality, such as monitoring their borders and preventing their resources from being used in the conflict.
Another misunderstanding is that neutrality guarantees safety from attack. While neutral states are protected under international law, violations can and do occur, sometimes leading to diplomatic disputes or even military confrontations.
Lastly, some assume that neutrality is easy to maintain, but in practice, it requires careful balancing of diplomatic relations and strict adherence to international rules to avoid being perceived as biased.
Example
Switzerland maintained its neutrality during both World Wars by preventing its territory from being used for military operations and interning foreign troops who crossed its borders.