This is based on the Cesium Cardboard example to respond to a VR device orientation.
The WebVR API provides purpose-built interfaces to VR hardware to allow developers to build compelling, comfortable VR experiences.
Cesium is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.
milsymbol.js is a library in pure JavaScript that creates SVG symbols according to MIL-STD-2525C, MIL-STD-2525D and NATO STANAG APP6(b).
Install Cesium version 1.25 or greater.
Download milsymbol.js and put it in the "Cesium/Apps" directory.
Put this file "testwebvr.html" also in the "Cesium/Apps" directory.
Connect your VR headset to your computer.
Launch Cesium (node server.js).
Point your browser to http://localhost:8080/Apps/testwebvr.html
Push the VR button on the bottom right corner to go into VR mode.
Move your head around Sydney Australia.
I don't have a VR device, so let me know if this works.