@Rimuru sama This also happens in politics. Countries say they trust one another, which is why they establish peace treaties and alliances. But there is never complete certainty that peace will last. Even during peaceful times, nations must remain cautious and prepare countermeasures in case war ever breaks out.
Only the ignorant truly believe that peace means there is no possibility of conflict. For ordinary people, peace may simply mean that there is no war happening at the moment. But at the highest levels of government and diplomacy, it is often viewed differently. Leaders and policymakers have to consider potential threats, speculate about possible scenarios, and prepare for situations that may never happen. Peace, in that sense, is not necessarily the absence of preparation for war—it can also involve being prepared to preserve peace if circumstances change.