[SauronOfMordor]

Tanks are ok in Europe and in the desert. They are a bit heavy for Third World bridges.

A tank is only useful if it can get to where the fighting is. We may need to look at much lighter, unmanned vehicles that can fit in narrow places, go over weak bridges, and can be deployed in swarms.

[Dogbert41]

Like aircraft carriers, they are very vulnerable these days.

[conservatism_IS_compassion]

We may need to look at much lighter, unmanned vehicles that can fit in narrow places, go over weak bridges, and can be deployed in swarms.

I think you just described AUVs . . .