diff --git a/pkg/app/web/src/modules/commands/index.ts b/pkg/app/web/src/modules/commands/index.ts
index 04609cf9ef..be4fe435c4 100644
--- a/pkg/app/web/src/modules/commands/index.ts
+++ b/pkg/app/web/src/modules/commands/index.ts
@@ -19,6 +19,7 @@ export const COMMAND_TYPE_TEXT: Record<Command.Type, string> = {
   [Command.Type.SYNC_APPLICATION]: "Sync Application",
   [Command.Type.UPDATE_APPLICATION_CONFIG]: "Update Application Config",
   [Command.Type.BUILD_PLAN_PREVIEW]: "Build Plan Preview",
+  [Command.Type.CHAIN_SYNC_APPLICATION]: "Chain Sync Application",
 };
 
 const commandsAdapter = createEntityAdapter<Command.AsObject>();
diff --git a/pkg/model/command.proto b/pkg/model/command.proto
index 8d7c08587d..eb1e7dbdf3 100644
--- a/pkg/model/command.proto
+++ b/pkg/model/command.proto
@@ -34,6 +34,7 @@ message Command {
         CANCEL_DEPLOYMENT = 2;
         APPROVE_STAGE = 3;
         BUILD_PLAN_PREVIEW = 4;
+        CHAIN_SYNC_APPLICATION = 5;
     }
 
     message SyncApplication {
@@ -66,6 +67,13 @@ message Command {
         int64 timeout = 5 [(validate.rules).int64.gte = 0];
     }
 
+    message ChainSyncApplication {
+        string deployment_chain_id = 1;
+        int32 block_index = 2;
+        string application_id = 3 [(validate.rules).string.min_len = 1];
+        SyncStrategy sync_strategy = 4;
+    }
+
     // The generated unique identifier.
     string id = 1 [(validate.rules).string.min_len = 1];
     string piped_id = 2 [(validate.rules).string.min_len = 1];
@@ -86,6 +94,7 @@ message Command {
     CancelDeployment cancel_deployment = 33;
     ApproveStage approve_stage = 34;
     BuildPlanPreview build_plan_preview = 35;
+    ChainSyncApplication chain_sync_application = 36;
 
     int64 created_at = 100 [(validate.rules).int64.gt = 0];
     int64 updated_at = 101 [(validate.rules).int64.gt = 0];