President Klaus Iohannis ends his four-nation tour, widely seen as part of attempts by smaller former communist states to compete with Russia in Africa.
Russia is building nuclear installations in several countries presently torn by Islamic jihadism, raising growing concern in the international community.
Washington locked into 'desperate game of catchup,' as it scrambles to secure access to essential strategic elements for computers, electric vehicle batteries.
Security analysts say terrorist organizations, along with Russian mercenaries from the Wagner Group, are filling the void left by departing French troops.