What could be the consequences of EU/German troops moving into Ukraine (even if they were 'only there to drop off an order') just as Russian ones have invaded?
Have a think about it.
If you need a little nudge in the direction of how that would be interpreted, how about;
'German troops have entered this conflict as an aggressor. It is clear that this is an act of war against Russia by NATO/the EU'
or
'German soldiers have been killed by Russian forces whilst delivering supplies. This is an act of war against NATO forces which cannot go unanswered'.
or
'Look, we've got NATO troops coming in and joining Ukraine forces. If China stays neutral, they will undoubtedly do exactly the same regarding your 'rightful' sovereignty over Taiwan/Hong Kong/the northern islands of Japan' 'Yes, you are right, this aggression and interference in your internal matters must not be allowed to continue lest they then turn their imperialist eyes towards our own nation' [China then goes further to escalate matters in the Far East and calls in the favours purchased through multiple investments in African nations where Uranium and other precious resources are located]
not to forget
'The gas supply is permanently off as a result of Western imperialist aggression. Have fun meeting your power needs' [Oil prices go through the roof, China cuts off supply of steel, coal, manufactured goods and everything else, etc, etc...]
and
'Shit. The banking system is down. All those trillions of dollars, gone. Nobody has money. The supply chain has folded and deliveries of food items aren't happening. Health systems have frozen and medical records lost, no treatment is possible.'
Seriously, think about it. All they could do was the military equivalent of Amazon knocking on the door and legging it back to the van before you've got off the sofa, as the consequences of being found, never mind attacked/imprisoned/executed/murdered in Ukrainian territory would have been catastrophic.