Whole Eastern Europe has mostly Russian military hardware and guess what, we are basically enemies with Russia and we manage.
We buy new equipment from Western countries now but large majority of equipment is still Soviet made.
Choices.
BTW. Regarding the oil and gas, India started buying when it didn't need to
. EU is dependent on that oil and gas (Eastern Europe was forced on that dependency, Westerners stupidly joined) - e.g. cars will stop on streets, people will freeze in houses (ok, maybe not now, fortunately Spring is coming, but we still have 0-8 Celcius here, not fun to be in unheated house in that temperature).
And we try to stop it, e.g. in Poland we worked on that and hopefully by the end of the year we can stop importing gas from Russia.
Choices.
BTW. Regarding the oil and gas, India started buying when it didn't need to . EU is dependent on that oil and gas (Eastern Europe was forced on that dependency, Westerners stupidly joined) - e.g. cars will stop on streets, people will freeze in houses (ok, maybe not now, fortunately Spring is coming, but we still have 0-8 Celcius here, not fun to be in unheated house in that temperature). And we try to stop it, e.g. in Poland we worked on that and hopefully by the end of the year we can stop importing gas from Russia.