This was corporate property insurance, and it excluded "acts of war". It doesn't matter who the war is between; the fact that a cost was incurred due to war would mean that you cannot claim that cost on the insurance policy. If it only referred to acts against a specific state, then you would have no need to include the wording in the contract as it would be a no-op.

Insurance policies have often tried to exclude the highly-unlikely-but-ruiniously-costly coverage; hence the similar "acts of god" exclusions (and obvs there's rarely any disagreement about whether god was specifically the actor). A war is a usually a large-scale event causing a large amount of damage; without excluding it you would expect many insurers to be bankrupted. "Cyberwar" is something of a different matter and I could see why either side would want to litigate to clarify the definition.