diff --git a/Commands/MarkAllReadCommand.swift b/Commands/MarkAllReadCommand.swift
new file mode 100644
index 000000000..3c00f3816
--- /dev/null
+++ b/Commands/MarkAllReadCommand.swift
@@ -0,0 +1,46 @@
+//
+//  MarkAllReadCommand.swift
+//  Evergreen
+//
+//  Created by Brent Simmons on 10/26/17.
+//  Copyright © 2017 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+import RSCore
+import Data
+
+final class MarkAllReadCommand: UndoableCommand {
+    
+    static private let actionName = NSLocalizedString("Mark All as Read", comment: "command")
+    let undoActionName = actionName
+    let redoActionName = actionName
+    let articles: Set<Article>
+    
+    init(initialArticles: [Article]) {
+        
+        // Filter out articles already read.
+        let unreadArticles = initialArticles.filter { !$0.status.read }
+        self.articles = Set(unreadArticles)
+    }
+    
+    func perform() {
+        mark(read: true)
+    }
+    
+    func undo() {
+        mark(read: false)
+    }
+    
+    func redo() {
+        perform()
+    }
+}
+
+private extension MarkAllReadCommand {
+    
+    func mark(read: Bool) {
+        
+        markArticles(articles, statusKey: .read, flag: read)
+    }
+}
diff --git a/Evergreen.xcodeproj/project.pbxproj b/Evergreen.xcodeproj/project.pbxproj
index 0b2ac254e..d4c024066 100644
--- a/Evergreen.xcodeproj/project.pbxproj
+++ b/Evergreen.xcodeproj/project.pbxproj
@@ -17,6 +17,7 @@
 		846E773E1F6EF67A00A165E2 /* Account.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 846E773A1F6EF5D700A165E2 /* Account.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		846E77411F6EF6A100A165E2 /* Database.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 846E77211F6EF5D100A165E2 /* Database.framework */; };
 		846E77421F6EF6A100A165E2 /* Database.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 846E77211F6EF5D100A165E2 /* Database.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		84702AA41FA27AC0006B8943 /* MarkAllReadCommand.swift in Sources */ = {isa = PBXBuildFile; fileRef = 84702AA31FA27AC0006B8943 /* MarkAllReadCommand.swift */; };
 		849A97431ED9EAA9007D329B /* AddFolderWindowController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 849A97421ED9EAA9007D329B /* AddFolderWindowController.swift */; };
 		849A97531ED9EAC0007D329B /* AddFeedController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 849A97511ED9EAC0007D329B /* AddFeedController.swift */; };
 		849A97541ED9EAC0007D329B /* AddFeedWindowController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 849A97521ED9EAC0007D329B /* AddFeedWindowController.swift */; };
@@ -382,6 +383,7 @@
 		846A7BEB1F872C5600FEFD30 /* BatchUpdate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = BatchUpdate.swift; path = Evergreen/BatchUpdate.swift; sourceTree = "<group>"; };
 		846E77161F6EF5D000A165E2 /* Database.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = Database.xcodeproj; path = Frameworks/Database/Database.xcodeproj; sourceTree = "<group>"; };
 		846E77301F6EF5D600A165E2 /* Account.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = Account.xcodeproj; path = Frameworks/Account/Account.xcodeproj; sourceTree = "<group>"; };
+		84702AA31FA27AC0006B8943 /* MarkAllReadCommand.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MarkAllReadCommand.swift; sourceTree = "<group>"; };
 		849A97421ED9EAA9007D329B /* AddFolderWindowController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AddFolderWindowController.swift; sourceTree = "<group>"; };
 		849A97511ED9EAC0007D329B /* AddFeedController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = AddFeedController.swift; path = AddFeed/AddFeedController.swift; sourceTree = "<group>"; };
 		849A97521ED9EAC0007D329B /* AddFeedWindowController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = AddFeedWindowController.swift; path = AddFeed/AddFeedWindowController.swift; sourceTree = "<group>"; };
@@ -520,6 +522,14 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
+		84702AB31FA27AE8006B8943 /* Commands */ = {
+			isa = PBXGroup;
+			children = (
+				84702AA31FA27AC0006B8943 /* MarkAllReadCommand.swift */,
+			);
+			path = Commands;
+			sourceTree = "<group>";
+		};
 		849A97411ED9EAA9007D329B /* Add Folder */ = {
 			isa = PBXGroup;
 			children = (
@@ -676,6 +686,7 @@
 				84DAEE311F870B390058304B /* DockBadge.swift */,
 				842E45DC1ED8C54B000A8B52 /* Browser.swift */,
 				846A7BEB1F872C5600FEFD30 /* BatchUpdate.swift */,
+				84702AB31FA27AE8006B8943 /* Commands */,
 				842E45E11ED8C681000A8B52 /* MainWindow */,
 				842E45E01ED8C587000A8B52 /* Preferences */,
 				849A97861ED9ECEF007D329B /* Article Styles */,
@@ -1174,6 +1185,7 @@
 				842E45E51ED8C6B7000A8B52 /* MainWindowSplitView.swift in Sources */,
 				849A97661ED9EB96007D329B /* SidebarViewController.swift in Sources */,
 				849A97641ED9EB96007D329B /* SidebarOutlineView.swift in Sources */,
+				84702AA41FA27AC0006B8943 /* MarkAllReadCommand.swift in Sources */,
 				849A979F1ED9F130007D329B /* SidebarCell.swift in Sources */,
 				849A97651ED9EB96007D329B /* SidebarTreeControllerDelegate.swift in Sources */,
 				849A97671ED9EB96007D329B /* UnreadCountView.swift in Sources */,