From the comments so far seems like nobody read the article. There is no "AI" or any involvement in the actual fighting. The start-up backed by Eric Schmidt is

From the comments so far seems like nobody read the article. There is no "AI" or any involvement in the actual fighting. The start-up backed by Eric Schmidt is virtually testing component designs to search for faults, incompatibilities and such. It's a ML CI for CAD projects: > Ishtari uses machine learning to virtually assemble and test war machines from computer models of individual components, such as the chassis and engines, that are usually marooned on separate digital drawing boards