Maven only tries downloading from one repository

Question

I have two repositories configured in the ~/.m2/settings.xml:

                        <repositories>
                                <repository>
                                        <snapshots>
                                                <enabled>false</enabled>
                                        </snapshots>
                                        <id>thirdparty</id>
                                        <name>thirdparty</name>
                                        <url>https://artifact.example.net/artifactory/thirdparty</url>
                                </repository>
                                <repository>
                                        <snapshots>
                                                <enabled>false</enabled>
                                        </snapshots>
                                        <id>our-releases</id>
                                        <name>our-releases</name>
                                        <url>https://artifact.example.net/artifactory/our-releases</url>
                                </repository>
                        </repositories>

The project's pom.xml makes no mention of either of the two. When I run mvn install, Maven tries to download the JARs from only one of the repositories.

When such a download fails (such as with 403 forbidden), Maven fails too -- instead of trying to obtain the same JAR from the other repository, which actually has it.

What am I doing wrong?