Flattery and pressure — coupled with President Trump’s growing dissatisfaction with President Vladimir V. Putin — have helped build momentum for new economic punishments.

The Strasbourg-based European Court of Human Rights said Russia had performed indiscriminate military attacks, summary executions of civilians, torture including the use of rape as a weapon of war, unjustified displacement and transfer of civilians and other violations.

It’s the first time an international court has concluded there have been widespread human rights abuses by Russian forces in Ukraine.