Military plans and operations, back when we lived on Earth 1, would have been classified because the release of the information could have enabled the enemy to thwart the operation. If they don't consider detailed information about imminent strikes classified, would these incompetents also say that sharing China OPLANs with with the infinitely compromised Elon Musk is also ok?
Here are the list of things that can be classified if they meet the harm descriptions outlined for TS, S, and C.
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Executive Order 13526 - Classified National Security Information [Excerpt]
Sec. 1.4. Classification Categories. Information shall not be considered for classification unless its unauthorized disclosure could reasonably be expected to cause identifiable or describable damage to the national security in accordance with section 1.2 of this order, and it pertains to one or more of the following:
(a) military plans, weapons systems, or operations;
(b) foreign government information;
(c) intelligence activities (including covert action), intelligence sources or methods, or cryptology;
(d) foreign relations or foreign activities of the United States, including confidential sources;
(e) scientific, technological, or economic matters relating to the national security;
(f) United States Government programs for safeguarding nuclear materials or facilities;
(g) vulnerabilities or capabilities of systems, installations, infrastructures, projects, plans, or protection services relating to the national security; or
(h) the development, production, or use of weapons of mass destruction.
Last update of this E.O.: https://obamawhitehouse.archives.gov/the-press-office/executive-order-classified-national-security-information