Donetsk, Luhansk, Kherson and Zaporizhzhia oblasts are partially occupied by Russian troops. Russia claims to have annexed the whole territory of those regions despite not controlling two regional capitals — Kherson and Zaporizhzhia. Moscow also controls all of Ukraine's Crimean peninsula.

A scenario in which Ukraine becomes a member of NATO despite some of its territories remaining occupied is quite realistic. In Ukraine's case, there are ways to address the issue of applying the mutual defense clause,

Former NATO Secretary General Jens Stoltenberg believes that a scenario in which Ukraine becomes a member of the Alliance while some of its territories are occupied is possible. Source: European Pravda citing his interview with the Financial Times Details: The former NATO Secretary General believes that there are ways to solve the problem of