A historical feud threatens a key wartime alliance for Ukraine

Key Points:

• A historical dispute between Poland and Ukraine over the Ukrainian Insurgent Army (UPA) has escalated, with Poland revoking Ukrainian President Zelenskyy’s top honor due to UPA's alleged mass killings of Polish villagers during World War II.
• Ukraine views the UPA as nationalist heroes resisting Soviet and Nazi forces, while Poland condemns them for ethnic cleansing, straining relations amid ongoing military and humanitarian cooperation against Russia.
• The feud risks sidelining Poland in Ukraine's peace process and complicates Ukraine’s EU membership prospects, as Polish opposition calls for blocking accession talks despite Poland’s critical role as a logistical and military supporter.
• Both sides accuse each other of politicizing the issue, but Polish officials insist on confronting historical injustices, while Ukrainian leaders emphasize current military cooperation and shared security interests.
• Russia is exploiting the dispute to undermine Ukrainian and Polish unity, with Kremlin officials reiterating false claims of Nazi glorification in Ukraine to justify the invasion, prompting calls from European leaders to de-escalate tensions.