Global Positioning System (GPS) is essential for military operations around the world. It helps armies pinpoint exact locations, even in the middle of intense battles. For decades, the United States has been the leader in GPS technology, with its own Global Navigation Satellite System (GNSS). But things are changing. China and the European Union have been improving their own systems, and in some parts of the world, their coverage might even be better than the US’s.

The GPS Dilemma

GPS...