  When Russia invaded Ukraine on the 24\textsuperscript{th} of February 2022,
this led to many acts of solidarity with Ukraine, including support for its
electricity system. Just 20 days after the invasion started, the Ukrainian and
Moldovan power grids were synchronized to the Continental European power grid
to provide stability to these grids. Here, we present an initial analysis of
how this synchronization affected the statistics of the power grid frequency
and cross-border flows of electric power within Continental Europe. We observe
faster inter-area oscillations, an increase in fluctuations and changes in the
cross-border flows in and out of Ukraine and surrounding countries as an effect
of the synchronization with Continental Europe. Overall these changes are small
such that the now connected system can be considered as stable as before the
synchronization.
