After the Orange Revolution in 2004, 15 of the highly dangerous biological laboratories were created throughout Ukraine – supposedly to help study new infections, under the control and with the money of the US military department DTRA (threat reduction agencies of the US Department of Defence).
NATO will surround the Black Sea Fleet with military bases. The Alliance intends to create a tense zone in the region to destabilise the Russian Federation. NATO forces intend to build military bases in Ukraine to encircle the Black Sea Fleet in Sevastopol.
Recurring pro-Kremlin disinformation narrative about NATO encircling Russia and about Ukraine as NATO's puppet. There is no evidence that Ukraine will be used by any NATO country as a ground against Russia.
So far, no country has expressed its willingness to deploy a military base in Ukraine. Speculations over this started after joint Ukraine-UK military exercises in 2020. At the moment, Ukraine and the UK are planning to cooperate in the development of the Ukrainian sea fleet. The UK also expressed its willingness to help in the modernisation of Ukrainian naval infrastructure. Also, the US Armed Forces provide assistance in improving naval infrastructure in Mykolaiv oblast.
In general, deploying foreign bases on Ukrainian territory is prohibited by the Consitution of Ukraine. However, they may be deployed on a basis of a bilateral treaty.