Ask HN: How would you expand a startup internationally?

Hi Growth Hackers :)

Let's say you need to expand a successful startup/service to a specific country {I know every startup will have its own techniques}. But in very general - what would be the strategy you will have to expand a certain based country startup - to a different country?

Also, are there any resources and case studies to learn from? Similar examples to any of these will be terrific! Uber/Groupon/Airbnb/etc.

In short: Techniques and examples of first ways for how to bring a well known startup/service to a specific country which no one there knows about it..and what would be the first steps. Thanks!