The copyright for its contents is most likely held by the author or the company that created the software, GPG and/or THQ, and/or Chris Taylor.
It is believed that the use of a limited number of web-resolution screenshots:
for identification of and critical commentary on the software in question. It is used on the corresponding unit page, to illustrate the unit, on the complete unit list, to find units easily, and finally, it may appear on the Strategic Icon page, to illustrate what a strategic icon is.
in the absence of a free alternative, which there isn't.
This file is copyrighted. The individual who uploaded this work and first used it in an article, and subsequent persons who place it into articles, assert that this qualifies as fair use of the material under United States copyright law.