Favs I guess

• spain↑ x portugal↓
• ukraine x georgia(fem)
• bangladesh x nepal
• uyghur khaganate x sogdiana
• samoa↑ x tonga↓

Other

• ROC x USA (ww2 only)
• palestine x yemen
• puerto rico x jamaica
• morocco x senegal
• honduras↑ x el salvador↓
• zimbabwe x south africa
• angola x DR congo
• mexico x philippines (any)
• cuba x venezuela