Index: binaries/data/mods/public/simulation/components/Attack.js
===================================================================
--- binaries/data/mods/public/simulation/components/Attack.js
+++ binaries/data/mods/public/simulation/components/Attack.js
@@ -488,10 +488,14 @@
 
 	// If the repeat time since the last attack hasn't elapsed,
 	// delay the action to avoid attacking too fast.
+	// Also add a random offset to the repeat time,
+	// to avoid units attacking in perfect synchronicity.
 	let prepare = timings.prepare;
+	let randomOffset = timings.repeat * 0.025;
+	let repeat = timings.repeat + randIntInclusive(-randomOffset, randomOffset);
 	if (this.lastAttacked)
 	{
-		let repeatLeft = this.lastAttacked + timings.repeat - cmpTimer.GetTime();
+		let repeatLeft = this.lastAttacked + repeat - cmpTimer.GetTime();
 		prepare = Math.max(prepare, repeatLeft);
 	}
 
@@ -499,7 +503,7 @@
 	if (cmpVisual)
 	{
 		cmpVisual.SelectAnimation("attack_" + type.toLowerCase(), false, 1.0);
-		cmpVisual.SetAnimationSyncRepeat(timings.repeat);
+		cmpVisual.SetAnimationSyncRepeat(repeat);
 		cmpVisual.SetAnimationSyncOffset(prepare);
 	}
 
@@ -507,7 +511,7 @@
 	this.resyncAnimation = prepare != timings.prepare;
 	this.target = target;
 	this.callerIID = callerIID;
-	this.timer = cmpTimer.SetInterval(this.entity, IID_Attack, "Attack", prepare, timings.repeat, type);
+	this.timer = cmpTimer.SetInterval(this.entity, IID_Attack, "Attack", prepare, repeat, type);
 
 	return true;
 };