Claas, a manufacturer of agricultural machinery, increased output at its main German factory by 30% last year. HARSEWINKEL, Germany—When Russia invaded Ukraine, Russian President Vladimir Putin was counting on soaring energy prices and falling confidence to sink European companies, undermining the West’s support for Kyiv. One year on, many European companies have overcome the blow after slashing energy use and pivoting to a friendly and booming U.S. market. Such resilience has helped shore up political and popular support in Europe for Ukraine.

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