diff --git a/Apps/SampleData/MultipartVehicle_part1.czml b/Apps/SampleData/MultipartVehicle_part1.czml
new file mode 100644
index 000000000000..c9f1d359fd37
--- /dev/null
+++ b/Apps/SampleData/MultipartVehicle_part1.czml
@@ -0,0 +1,244 @@
+[
+  {
+    "id":"document",
+    "version":"1.0"
+  },
+  {
+    "id":"Vehicle",
+    "availability":"2012-08-04T16:00:00Z/2012-08-04T17:04:54.9962195740191Z",
+    "label":{
+      "fillColor":[
+        {
+          "interval":"2012-08-04T16:00:00Z/2012-08-04T18:00:00Z",
+          "rgba":[
+            255,255,0,255
+          ]
+        }
+      ],
+      "font":"bold 10pt Segoe UI Semibold",
+      "horizontalOrigin":"CENTER",
+      "outlineColor":{
+        "rgba":[
+          0,0,0,255
+        ]
+      },
+      "pixelOffset":{
+        "cartesian2":[
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+        ]
+      },
+      "scale":1.0,
+      "show":[
+        {
+          "interval":"2012-08-04T16:00:00Z/2012-08-04T18:00:00Z",
+          "boolean":true
+        }
+      ],
+      "style":"FILL",
+      "text":"Test Vehicle",
+      "verticalOrigin":"CENTER"
+    },
+    "model":{
+      "gltf":"models/CesiumMilkTruck/CesiumMilkTruck.glb",
+      "minimumPixelSize":100,
+      "maximumScale":50
+    },
+    "orientation" : {
+      "velocityReference": "#position"
+    },
+    "viewFrom": {
+      "cartesian": [ -2080, -1715, 779 ]
+    },
+    "properties" : {
+        "fuel_remaining" : {
+            "epoch":"2012-08-04T16:00:00Z",
+            "number": [
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+                1500, 21.2
+            ]
+        }
+    },
+    "path":{
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+          "solidColor":{
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+                ]
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+      },
+      "width":[
+        {
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+          "number":5.0
+        }
+      ],
+      "show":[
+        {
+          "interval":"2012-08-04T16:00:00Z/2012-08-04T18:00:00Z",
+          "boolean":true
+        }
+      ]
+    },
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diff --git a/Apps/SampleData/MultipartVehicle_part2.czml b/Apps/SampleData/MultipartVehicle_part2.czml
new file mode 100644
index 000000000000..a1a7f69045b5
--- /dev/null
+++ b/Apps/SampleData/MultipartVehicle_part2.czml
@@ -0,0 +1,174 @@
+[
+  {
+    "id":"document",
+    "version":"1.0"
+  },
+  {
+    "id":"Vehicle",
+    "properties" : {
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+            "number": [
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+            ]
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+      ]
+    }
+  }
+]
diff --git a/Apps/SampleData/MultipartVehicle_part3.czml b/Apps/SampleData/MultipartVehicle_part3.czml
new file mode 100644
index 000000000000..610d6cb8ea15
--- /dev/null
+++ b/Apps/SampleData/MultipartVehicle_part3.czml
@@ -0,0 +1,114 @@
+[
+  {
+    "id":"document",
+    "version":"1.0"
+  },
+  {
+    "id":"Vehicle",
+    "properties" : {
+        "fuel_remaining" : {
+            "epoch":"2012-08-04T16:00:00Z",
+            "number": [
+                4500, 18.6
+            ]
+        }
+    },
+    "position":{
+      "interpolationAlgorithm":"LAGRANGE",
+      "interpolationDegree":1,
+      "epoch":"2012-08-04T16:00:00Z",
+      "cartesian":[
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+      ]
+    }
+  }
+]
diff --git a/Apps/Sandcastle/gallery/Multi-part CZML.html b/Apps/Sandcastle/gallery/Multi-part CZML.html
new file mode 100644
index 000000000000..68b80c6b1fa2
--- /dev/null
+++ b/Apps/Sandcastle/gallery/Multi-part CZML.html	
@@ -0,0 +1,158 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
+    <meta name="description" content="A CZML example showing a single entity path split across multiple CZML streams.">
+    <meta name="cesium-sandcastle-labels" content="Showcases, DataSources, CZML">
+    <title>Cesium Demo</title>
+    <script type="text/javascript" src="../Sandcastle-header.js"></script>
+    <script type="text/javascript" src="../../../ThirdParty/requirejs-2.1.20/require.js"></script>
+    <script type="text/javascript">
+        if(typeof require === "function") {
+            require.config({
+                baseUrl : '../../../Source',
+                waitSeconds : 120
+            });
+        }
+    </script>
+</head>
+<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
+<style>
+    @import url(../templates/bucket.css);
+</style>
+<div id="cesiumContainer" class="fullSize"></div>
+<div id="loadingOverlay"><h1>Loading...</h1></div>
+<div id="toolbar"></div>
+
+<script id="cesium_sandcastle_script">
+function startup(Cesium) {
+    'use strict';
+//Sandcastle_Begin
+var viewer = new Cesium.Viewer('cesiumContainer', {
+    shouldAnimate : true
+});
+
+var statusDisplay = document.createElement('div');
+var fuelDisplay = document.createElement('div');
+var czmlPath = '../../SampleData/';
+var vehicleEntity;
+
+// Add a blank CzmlDataSource to hold our multi-part entity/entities.
+var dataSource = new Cesium.CzmlDataSource();
+viewer.dataSources.add(dataSource);
+
+// This demo shows how a single path can be broken up into several CZML streams.
+var partsToLoad = [{
+    url: 'MultipartVehicle_part1.czml',
+    range: [0, 1500],
+    requested: false,
+    loaded: false
+}, {
+    url: 'MultipartVehicle_part2.czml',
+    range: [1500, 3000],
+    requested: false,
+    loaded: false
+}, {
+    url: 'MultipartVehicle_part3.czml',
+    range: [3000, 4500],
+    requested: false,
+    loaded: false
+}];
+
+function updateStatusDisplay() {
+    var msg = '';
+    partsToLoad.forEach(function(part) {
+        msg += part.url + ' - ';
+        if (part.loaded) {
+            msg += 'Loaded.<br/>';
+        } else if (part.requested) {
+            msg += 'Loading now...<br/>';
+        } else {
+            msg += 'Not needed yet.<br/>';
+        }
+    });
+    statusDisplay.innerHTML = msg;
+}
+
+// Helper function to mark a part as requested, and process it into the dataSource.
+function processPart(part) {
+    part.requested = true;
+    updateStatusDisplay();
+    dataSource.process(czmlPath + part.url).then(function() {
+        part.loaded = true;
+        updateStatusDisplay();
+
+        // Follow the vehicle with the camera.
+        if (!viewer.trackedEntity) {
+            viewer.trackedEntity = vehicleEntity = dataSource.entities.getById('Vehicle');
+        }
+    });
+}
+
+// Load the first part up front.
+processPart(partsToLoad[0]);
+
+// Load a new section before the clock naturally gets there.
+// Note this can't predict when a user may fast-forward to it.
+var preloadTimeInSeconds = 100;
+
+viewer.clock.onTick.addEventListener(function(clock) {
+    // This example uses time offsets from the start to identify which parts need loading.
+    var timeOffset = Cesium.JulianDate.secondsDifference(clock.currentTime, clock.startTime);
+
+    // Filter the list of parts to just the ones that need loading right now.
+    // Then, process each part that needs loading.
+    partsToLoad.filter(function(part) {
+        return (!part.requested) &&
+            (timeOffset >= part.range[0] - preloadTimeInSeconds) &&
+            (timeOffset <= part.range[1]);
+    }).forEach(function(part) {
+        processPart(part);
+    });
+
+    if (vehicleEntity) {
+        var fuel = vehicleEntity.properties.fuel_remaining.getValue(clock.currentTime);
+        if (Cesium.defined(fuel)) {
+            fuelDisplay.textContent = 'Fuel: ' + fuel.toFixed(2) + ' gal';
+        }
+    }
+});
+
+// Add a reset button, for convenience.
+Sandcastle.addToolbarButton('Reset demo', function() {
+    // Put things back to the starting position.
+    viewer.clock.currentTime = viewer.clock.startTime;
+    viewer.clock.shouldAnimate = true;
+
+    partsToLoad.forEach(function(part) {
+        part.requested = false;
+        part.loaded = false;
+    });
+
+    dataSource.entities.removeAll();
+    processPart(partsToLoad[0]);
+});
+
+// Show the status display below the reset button.
+statusDisplay.style.background = 'rgba(42, 42, 42, 0.7)';
+statusDisplay.style.padding = '5px 10px';
+document.getElementById('toolbar').appendChild(statusDisplay);
+
+// Show a multi-part custom property being read from CZML.
+fuelDisplay.style.background = 'rgba(42, 42, 42, 0.7)';
+fuelDisplay.style.padding = '5px 10px';
+fuelDisplay.style.marginTop = '5px';
+document.getElementById('toolbar').appendChild(fuelDisplay);
+//Sandcastle_End
+    Sandcastle.finishedLoading();
+}
+if (typeof Cesium !== "undefined") {
+    startup(Cesium);
+} else if (typeof require === "function") {
+    require(["Cesium"], startup);
+}
+</script>
+</body>
+</html>
diff --git a/Apps/Sandcastle/gallery/Multi-part CZML.jpg b/Apps/Sandcastle/gallery/Multi-part CZML.jpg
new file mode 100644
index 000000000000..f02df208e50c
Binary files /dev/null and b/Apps/Sandcastle/gallery/Multi-part CZML.jpg differ
diff --git a/CHANGES.md b/CHANGES.md
index 538530a211a1..9bbaa229c836 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -13,14 +13,13 @@ Change Log
   * Removed the 6-clipping-plane limit.
   * Added support for Internet Explorer.
   * Added a `ClippingPlane` object to be used with `ClippingPlaneCollection`.
+* Updated `WebMapServiceImageryProvider` so it can take an srs or crs string to pass to the resource query parameters based on the WMS version. [#6223](https://github.com/AnalyticalGraphicsInc/cesium/issues/6223)
+* Added a multi-part CZML example to Sandcastle. [#6320](https://github.com/AnalyticalGraphicsInc/cesium/pull/6320)
 
 ##### Fixes :wrench:
 * Fixed support of glTF-supplied tangent vectors. [#6302](https://github.com/AnalyticalGraphicsInc/cesium/pull/6302)
 * Fixed improper zoom during model load failure. [#6305](https://github.com/AnalyticalGraphicsInc/cesium/pull/6305)
 
-#### Additions :tada:
-* Updated `WebMapServiceImageryProvider` so it can take an srs or crs string to pass to the resource query parameters based on the WMS version. [#6223](https://github.com/AnalyticalGraphicsInc/cesium/issues/6223)
-
 ### 1.43 - 2018-03-01
 
 ##### Major Announcements :loudspeaker: