War creates arms races (I know, ridiculously obvious but bear with me) and no aspect of war does this more than the use of landmines/IEDs.
In Nigeria's Biafran War, the Biafrans (my people, actually) used proximity-detonated IEDs called ogbunigwe which translates either as "killer by metal" OR "killer en-masse". The Nigerian troops responded by using cows as mine-detectors/literal meatshields. The Biafrans responded with airborne versions.
As for the more recent American wars in Afghanistan and Iraq, one could write a book about the measures and countermeasures taken by the IED makers and the US soldiers. Radio-detonated IEDs were defeated by radio emitters that would detonate them early. So they started using booby-trapped corpses so the Americans started destroying any corpses they found in the road and so on and so on.
To quote the late great Mac Tonnies "War is hell but if you keep at it long enough, it's heaven."
It was interesting for a person in India like me to know how Nigerian had to suffer because of mines. I knew about the mines in Cambodia and how much damage they did, even when the Khmer Rouge withdrew it sowed mines all over the place. I also knew about Afghanistan and Iraq, but hardly knew about Nigeria, great information. Mines should never be used, they end up killing innocent people.