I don't think it makes sense to compare Taiwan to a non-state actor. Taiwan may be a de facto separatist province, but it still has a state structure.Relative to other non state armed actors.
I don't think we should. Taiwan's AD may be managed, but it can't simply be disregarded.In terms of them actually going kinetic with the PLA, yes, the air defenses can be all but disregarded.
The underestimation of the adversary is what led Russia to its current quagmire in Ukraine.
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Otherwise, as per the latest (2023) issue of The Military Balance, Taiwan's AD assets are:
792nd SAM brigade: 1x bn with TK-3 (ABM), 2x bn with AAA/SHORAD
793rd SAM brigade: 1x bn with TK-2, 1x bn with Patriot system, 1x bn with Hawk system (to be retired in 2024)
794th SAM brigade: 1x bn with TK-2, 1x bn with Patriot system, 1x bn with Hawk system (to be retired in 2024)
795th SAM brigade: 1x bn with Patriot system, 2x bn with AAA/SHORAD
Overall, these four brigades have ~200 major launchers (Tien Kung II and III/Patriot/Hawk). The Patriot systems can be used both for anti-aircraft and ABM engagements.
As for ammunition, according to Taiwan received:
-236 MIM-23A Hawk interceptors
-665 (or 762) MIM-23B Hawk interceptors
-200 Patriot PAC-2 interceptors (anti-aircraft)
-386 Patriot PAC-3 interceptors (ABM)
In addition to these, an unknown number of TK-2/3 interceptors have been locally produced.