yeah, i just read a bit more there isn't military uses of phosphate per se (unless you count phosphorous munitions, which are not a big thing, but exist however)... but your point about them using agriculture as a means to manipulate other countries by controlling a large share of production

phosphate fertiliser ruins the soil though, long term, because it binds up rapidly with calcium... colloidal forms of phosphate are much more beneficial and long term good for plant fertility