People in Europe are becoming increasingly wary of the outcome of the next American Presidential Election. Conscription has been discussed in the UK, people forgetting that the reason we might need this is if the USA pulls out of NATO.
If the USA does elect Trump, there will then be a risk of Russia being able to liberate Russian people in the Baltic states in the same way that Russia has done in Crimea, Transnistria (also know as Pridnestrovie), Abkhazia and South Ossetia as well as what Russia is trying to with parts of Ukraine.
A European defence force without having to rely on Trump would be a great idea. Issues do arise about what to do with Hungary, the greatest ally of Russia within the block, and also, a replacement for a NATO where Trump cannot be trusted to help its members would probably exclude the UK.
