First things first you're gonna want start in either Africa or South America personally I start in Africa as Togo then attack Benin move up to Burkina Faso move to Guinea and Guinea bissau move to sierra leone then Liberia then to Senegal after that move to Tunisia after that move to Malawi then move to Burundi then Rwanda and Uganda after that move to the Balkans start with North Macedonia move to Albania then Montenegro then B&H (Bosnia and Herzegovina) after that move to Croatia then to Slovenia then move to the Baltics first attack Latvia then Estonia and then Lithuania. I will update this soon.

Cheers mikhal789.