This thesis addresses the strategic challenge of reinforcing the Baltics, mitigating the Suwałki Gap issue, in the context of Sweden’s NATO accession. Historically, Nordic military mobility focused on a north-south axis to defend the High-North. However, the shifting security environment necessitates a critical analysis of the west-to-east axis to ensure NATO and Euro-Atlantic sustainment of the Baltics, leveraging Sweden’s new role as a transit and Host Nation Support country. Given the lack of a theory-derived military sustainment line criteria model, this research constructs an innovative Supply Chain Risk Management theory derived Criteria Model as an evaluation tool. Using this tool, three routes from Norway to Sweden and a Baltic SPOD are analysed and ranked. The findings explain required infrastructure improvements and capability development in the Nordics necessary to enable a viable bypass of the Suwałki corridor, confirming whether the problem is solved, or significant work remains to ensure effective reinforcement.