Would we be able to fight a conventional war against Russia and China? Not unless we win quickly. China has become the arsenal of dictatorship with the help of free traitors
When propagandists frame Russia and the ChiComs as enemies as part of their theater for us little people, remember that the West has every warning about problems - whether with the ChiCom puppet North Korea or the Russian invasion of Georgia in 2008.
We’re not prepared for war because our leadership (both parties) is in bed with their leaders - and the nationalist president who called that out was removed from office by fraud in the 2020 election.
I think the US military wouldn’t fight the same way as Ukraine because of the Air Force and therefore wouldn’t use a large number of Stingers and Javelins.