If Ukraine is annexed by Russia, the defense of the Baltics becomes much more difficult, as Poland, Slovakia, Hungary, and Romania then become susceptible to Ru

If Ukraine is annexed by Russia, the defense of the Baltics becomes much more difficult, as Poland, Slovakia, Hungary, and Romania then become susceptible to Russian attack. (Moldova too but they're not in NATO) In the graph of adjacent nations, Ukraine has a high betweenness centrality https://www.researchgate.net/figure/Ranking-of-centrality-values-for-countries-Measures-of-centrality-Weighted-degree_tbl1_305371341/download https://www.researchgate.net/figure/Ranking-of-centrality-va...