diff --git a/src/core/operations/Disjoin.mjs b/src/core/operations/Disjoin.mjs
new file mode 100644
index 00000000..a78ac192
--- /dev/null
+++ b/src/core/operations/Disjoin.mjs
@@ -0,0 +1,123 @@
+/**
+ * @author masq [github.cyberchef@masq.cc]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Recipe from "../Recipe";
+import Dish from "../Dish";
+
+/**
+ * Disjoin operation
+ */
+class Disjoin extends Operation {
+
+    /**
+     * Disjoin constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Disjoin";
+        this.flowControl = true;
+        this.module = "Default";
+        this.description = "Runs further operations in parallel on the same input until a Join operation is reached";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Split delimiter",
+                "type": "binaryShortString",
+                "value": "\\n"
+            },
+            {
+                "name": "Merge delimiter",
+                "type": "binaryShortString",
+                "value": "\\n"
+            },
+            {
+                "name": "Ignore errors",
+                "type": "boolean",
+                "value": false
+            }
+        ];
+    }
+
+    /**
+     * @param {Object} state - The current state of the recipe.
+     * @param {number} state.progress - The current position in the recipe.
+     * @param {Dish} state.dish - The Dish being operated on.
+     * @param {Operation[]} state.opList - The list of operations in the recipe.
+     * @returns {Object} The updated state of the recipe.
+     */
+    async run(state) {
+        const opList     = state.opList,
+            inputType    = opList[state.progress].inputType,
+            outputType   = opList[state.progress].outputType,
+            input        = await state.dish.get(inputType),
+            ings         = opList[state.progress].ingValues,
+            [splitDelim, mergeDelim, ignoreErrors] = ings,
+            subRecList   = [];
+        let inputs       = [],
+            i;
+
+        if (input)
+            inputs = input.split(splitDelim);
+
+        // Create subOpList for each tranche to operate on
+        // (all remaining operations unless we encounter a Merge)
+        for (i = state.progress + 1; i < opList.length; i++) {
+            if (opList[i].name === "Merge" && !opList[i].disabled) {
+                break;
+            } else {
+                const subRec = new Recipe();
+                subRec.addOperations(opList[i]);
+                subRecList.push(subRec);
+            }
+        }
+
+        let output = "",
+            tmpProg = 0,
+            progress = 0;
+
+        state.forkOffset += state.progress + 1;
+
+        for (i = 0; i < subRecList.length; i++) {
+            const recipe = subRecList[i];
+
+            // Take a deep(ish) copy of the ingredient values
+            const ingValues = recipe.opList.map(op => JSON.parse(JSON.stringify(op.ingValues)));
+
+            // Run recipe over each input
+            for (let j = 0; j < inputs.length; j++) {
+                // Baseline ing values for each tranche so that registers are reset
+                recipe.opList.forEach((op, i) => {
+                    op.ingValues = JSON.parse(JSON.stringify(ingValues[i]));
+                });
+
+                const dish = new Dish();
+                dish.set(inputs[j], inputType);
+
+                try {
+                    tmpProg = await recipe.execute(dish, 0, state);
+                } catch (err) {
+                    if (!ignoreErrors) {
+                        throw err;
+                    }
+                    tmpProg = err.progress + 1;
+                }
+                output += await dish.get(outputType) + mergeDelim;
+            }
+            progress += tmpProg;
+        }
+
+        state.dish.set(output, outputType);
+        state.progress += progress;
+        return state;
+    }
+
+
+}
+
+export default Disjoin;