Fiber optic technology is in high demand in the military today. They are suited very well for their applications for the following reasons.
A fiber optic cable only needs a repeater (for the signal) every 16km or more, the coax cable on the other hand needs one every 500m. This reduces cost of a similar system with a lot. Also the coax weighs a lot more than a fiber optic cable, for example 16km of fiber optic cable weighs 550kg when the same length of coax cable weighs 2800kg.
On the other hand fiber optics are very safe to use. They are not affected by EMI or RFI like coax and they cannot be tapped by the enemy. This reduces the need for encryption of military communication. Fiber optics are strong and prove to operate well in harsh environments.
Do you think governments should spend the taxpayer’s money on improving the military? I think in many ways some nations (especially the USA) exaggerate on improving their military not only by implementing fiber optics but on all aspects. I wouldn’t necessarily feel safer or more powerful if Belgium had a big and advanced military.