The big ones that European countries participated in were 20 years of invasion in Afghanistan and the bombing of Libya. Some countries, like the UK, participated in the Iraq war(s). You could argue that Yugoslavia bombing was justified, but I'm sure anticommunism played a bigger role than enforcing human rights. We see now how much EU governments care about human rights in Palestine.

Tibet has been part of China for centuries. First through the Qing, then through the ROC (Taiwan today) and now through the PRC. Just because separatists claim independence does not mean that the PRC invaded it. Do you support European separatist factions, like in Northern Italy, Basque, Scotland, or Donbass? Hong Kong is a Chinese territory that was fucked up by British colonialism (seeing a pattern here) and was handed over peacefully by the British.

Europe doesn't engage in old colonialism anymore because the world has soured to that approach after centuries of wealth transfer towards Europe. Instead it installs friendly governments through military campaigns and then engages in neocolonialism, which has a similar effect, with a lower cost. What's your definition of standing army? The UK for example, has 70k full time military personnel, which I would count as a standing army. Similar numbers for Germany.