A visitor views models of Boeing planes | Wu Hong/EPA EU prepares €20B retaliation against US over Boeing subsidies The list covers products including tractors, suitcases, frozen fish, fruits, wine, liquors and ketchup.

The European Commission Wednesday said it wants to hit around €20 billion of U.S. exports with tariffs in retaliation for unlawful subsidies given by the U.S to American aircraft manufacturer Boeing.

The list covers a broad range of products including tractors, suitcases, frozen fish, fruits, wine, liquors and ketchup.

The publication of the list marks the next step in a yearslong World Trade Organization (WTO) fight between the EU and U.S. over subsidies for their planemakers Airbus and Boeing. The WTO's appellate body ruled in March that in at least one case, Boeing continued to benefit from a tax break given by Washington. The ruling opened the door for retaliation against the U.S.

Last year, the appellate body found Airbus also hadn't complied with a previous subsidy ruling. Washington earlier this month ratcheted up pressure on Brussels by releasing its own list covering about $11 billion of European goods that could be hit with punitive tariffs.

Both the EU's and the U.S.'s retaliation claims must be approved by a WTO arbitrator. Trade officials in Brussels and Geneva said they expect the WTO to determine lower retaliation amounts since both sides have probably inflated their claims.

EU trade chief Cecilia Malmström expressed hope that the dispute could ultimately be resolved through a settlement. “Let me be clear, we do not want a tit-for-tat,” she said. “I still believe that dialogue is what should prevail between important partners such as the EU and the U.S.”