I was a grunt, so it pains me to admit this, but the greatest killer on the battlefield wasn’t the infantry, nor even armor, but artillery. Since it is such a dominant force on the battlefield, we fell obliged to devote some attention to it. The press of other issues has kept us from going whole hog into it but here’s a taste.
One of the problems facing artillerymen today is collateral damage. The US can ill afford to miss its targets, lest we be blamed for slaughtering a “wedding party” (which seem to have a large number of military aged males but no women, and not a casserole dish in sight). That is one reason we’ve seen so many airstrikes in Iraq and Afghanistan- because they can use precision munitions. Artillery has had a laser guided round for decades, but it was horribly expensive and not terribly destructive. It was also laborious to use.
Now, in the age of GPS and very small inertial guidance systems, a cheap guided round is a reality.