If you need geographic redundancy beyond the European borders, what is your threat model trying to mitigate? E.g. Let's say you have servers in Norway, Germany

If you need geographic redundancy beyond the European borders, what is your threat model trying to mitigate? E.g. Let's say you have servers in Norway, Germany and Spain, what would be solved by e.g. having an extra one in the US? Roaming access can be handled through a VPN