https://en.wikipedia.org/wiki/List_of_countries_with_highest_military_expenditures
Just taking Germany+France+Italy+Poland+Spain already comes more than what Russia spends
Nor am I a military expert, I do not know how reliable they are that data or I will discuss the efficiency of the expense, but I am sure to have 27 army generates many inefficiencies that could be resolved by centralizing things
Ok, my failure, I believed that if the problem was to spend your defense budget on US weapons, the option to spend it on non US weapons was evident. In any case, surely the French, Belgian, Spanish or British defense industry would be happy to have new clients