To create a combined field multi-select (click while holding Ctrl) the Dimensions required in the view. In this case that’s Container and Region. Then right-click one of the selected Dimensions and select Combine Fields.
The combined field will then be found in the Dimensions pane. You can edit the field at any time by right-clicking. You can change the order of the fields, rename the field and set what character the members are separated by.
You can add however many fields to the combined field as needed. So if you need to sort based on three Dimensions, just multi-select all three before you create the combined field.
Now we have our combined field, we can re-create the view using the combined field, rather than the Region and Container fields.
The last step is to re-create the sort on the new combined field.
Here’s our final view: