From the wiki:

A Bolo is a fictional type of artificially intelligent tank. They were first imagined by Keith Laumer, and have since been featured in science fiction novels and short story anthologies by himself and others.

Here you will find stories about, or involving, Bolos: massive war tanks from Keith Laumer's Boloverse that exhibit varying degrees of sentience.

Image sources: banner, icon. (Images cropped/resized by DragonMaus.)