diff --git a/CHANGES/1175.feature b/CHANGES/1175.feature
new file mode 100644
index 000000000..c567abf70
--- /dev/null
+++ b/CHANGES/1175.feature
@@ -0,0 +1 @@
+Support per-component/architecture Release files for cross-validation by related installers (i.e. ubiquity and debian-installer).
\ No newline at end of file
diff --git a/pulp_deb/app/serializers/publication_serializers.py b/pulp_deb/app/serializers/publication_serializers.py
index a7d8c2cf5..3da7c68fb 100644
--- a/pulp_deb/app/serializers/publication_serializers.py
+++ b/pulp_deb/app/serializers/publication_serializers.py
@@ -45,6 +45,10 @@ class AptPublicationSerializer(PublicationSerializer):
         view_name="signing-services-detail",
         required=False,
     )
+    publish_legacy_release_files = BooleanField(
+        help_text="Whether or not to publish Legacy per-component-and-architecture Release files.",
+        default=False,
+    )
 
     def validate(self, data):
         """
@@ -62,6 +66,7 @@ class Meta:
             "checkpoint",
             "signing_service",
             "publish_upstream_release_fields",
+            "publish_legacy_release_files",
         )
         model = AptPublication
 
diff --git a/pulp_deb/app/tasks/publishing.py b/pulp_deb/app/tasks/publishing.py
index 222765e02..11e587433 100644
--- a/pulp_deb/app/tasks/publishing.py
+++ b/pulp_deb/app/tasks/publishing.py
@@ -83,6 +83,7 @@ def publish(
     repository_version_pk,
     simple,
     structured,
+    publish_legacy_release_files,
     checkpoint=False,
     signing_service_pk=None,
     publish_upstream_release_fields=None,
@@ -109,12 +110,19 @@ def publish(
 
     log.info(
         _(
-            "Publishing: repository={repo}, version={ver}, simple={simple}, structured={structured}"
+            (
+                "Publishing: repository={repo}, "
+                "version={ver}, "
+                "simple={simple}, "
+                "structured={structured}, "
+                "publish_legacy_release_files={publish_legacy_release_files}"
+            )
         ).format(  # noqa
             repo=repo_version.repository.name,
             ver=repo_version.number,
             simple=simple,
             structured=structured,
+            publish_legacy_release_files=publish_legacy_release_files,
         )
     )
     with tempfile.TemporaryDirectory(".") as temp_dir:
@@ -124,6 +132,7 @@ def publish(
             publication.simple = simple
             publication.structured = structured
             publication.signing_service = signing_service
+            publication.publish_legacy_release_files = publish_legacy_release_files
             repository = AptRepository.objects.get(pk=repo_version.repository.pk)
 
             if simple:
@@ -306,6 +315,7 @@ def __init__(self, parent, component):
         self.plain_component = os.path.basename(component)
         self.package_index_files = {}
         self.source_index_file_info = None
+        self.release_file_paths = {}
 
         for architecture in self.parent.architectures:
             package_index_path = os.path.join(
@@ -320,6 +330,12 @@ def __init__(self, parent, component):
                 open(package_index_path, "wb"),
                 package_index_path,
             )
+
+            if self.parent.publication.publish_legacy_release_files:
+                self.release_file_paths[architecture] = _write_legacy_release_file(
+                    self, architecture
+                )
+
         # Source indicies file
         source_index_path = os.path.join(
             "dists",
@@ -451,6 +467,13 @@ def finish(self):
             self.parent.add_metadata(source_index)
             self.parent.add_metadata(gz_source_index)
 
+        # Publish per-component/architecture Release files
+        for release_path in self.release_file_paths.values():
+            release = PublishedMetadata.create_from_file(
+                publication=self.parent.publication, file=File(open(release_path, "rb"))
+            )
+            self.parent.add_metadata(release)
+
     def generate_by_hash(self, index_path, index, gz_index_path, gz_index):
         for path, index in (
             (index_path, index),
@@ -477,6 +500,7 @@ def __init__(
         temp_dir,
         signing_service=None,
     ):
+        self._release = release
         self.publication = publication
         self.temp_env = {"PULP_TEMP_WORKING_DIR": _create_random_directory(temp_dir)}
         self.distribution = distribution = release.distribution
@@ -608,3 +632,36 @@ def _create_random_directory(path):
     dir_path = path + "/" + dir_name
     os.makedirs(dir_path, exist_ok=True)
     return dir_path
+
+
+def _write_legacy_release_file(component, arch):
+    """
+    Add legacy per-architecture release files
+    https://wiki.debian.org/DebianRepository/Format#Legacy_per-component-and-architecture_Release_files
+    :param component: ComponentHelper instance this belongs to.
+    :param arch: target architecture
+    :return: relative path of the release file
+    """
+
+    rel = deb822.Release()
+
+    parent_release = component.parent.release
+    rel["Archive"] = parent_release.get("Suite", parent_release["Codename"])
+    rel["Origin"] = parent_release.get("Origin", "Pulp 3")
+    rel["Label"] = parent_release.get("Label", "Pulp 3")
+    if settings.APT_BY_HASH:
+        rel["Acquire-By-Hash"] = settings.APT_BY_HASH
+    rel["Component"] = component.plain_component
+    rel["Architecture"] = arch
+
+    rel_path = os.path.join(
+        "dists",
+        component.parent.dists_subfolder,
+        component.plain_component,
+        f"binary-{arch}",
+        "Release",
+    )
+    os.makedirs(os.path.dirname(rel_path), exist_ok=True)
+    with open(rel_path, "wb") as fh:
+        rel.dump(fh)
+    return rel_path
diff --git a/pulp_deb/app/viewsets/publication.py b/pulp_deb/app/viewsets/publication.py
index 3c0624132..82ab27619 100644
--- a/pulp_deb/app/viewsets/publication.py
+++ b/pulp_deb/app/viewsets/publication.py
@@ -216,6 +216,7 @@ def create(self, request):
         publish_upstream_release_fields = serializer.validated_data.get(
             "publish_upstream_release_fields"
         )
+        publish_legacy_release_files = serializer.validated_data.get("publish_legacy_release_files")
 
         kwargs = {
             "repository_version_pk": repository_version.pk,
@@ -223,6 +224,7 @@ def create(self, request):
             "structured": structured,
             "signing_service_pk": getattr(signing_service, "pk", None),
             "publish_upstream_release_fields": publish_upstream_release_fields,
+            "publish_legacy_release_files": publish_legacy_release_files,
         }
         if checkpoint:
             kwargs["checkpoint"] = True