Maritime access for material from the Soviet Union—the only country, together with Mexico, which defied the Non-intervention Pact— aid was effectively cut off by the attacks of Italian submarines and the French frontier remained closed.
Akses laut untuk kiriman bantuan dari Uni Soviet—satu-satunya negara selain Meksiko yang menolak Perjanjian Non-Intervensi—diblokir oleh serangan kapal selam Italia dan perbatasan Prancis ditutup.