European confidence in American security guarantees has reached a historic low, according to a survey published Wednesday by the European Council on Foreign Relations.

The poll, conducted across 15 European countries, found that only one in 10 respondents view the United States as an ally. Majorities in all surveyed nations expressed doubt that the US would come to their aid if they were attacked.

The survey results indicate what researchers characterized as significant European mistrust toward the United States. The findings were released ahead of upcoming G7 and NATO summits scheduled to take place in France and Turkey in the coming weeks.

The timing of the survey's publication precedes critical diplomatic meetings where transatlantic relations and security cooperation are expected to be key discussion topics. The results suggest potential challenges for alliance coordination and mutual defense commitments.

The European Council on Foreign Relations, the think tank that commissioned the research, presented the findings as evidence of deteriorating confidence in US-European security partnerships. The survey did not specify the methodology, sample sizes, or exact timing of when the polling was conducted across the 15 countries.