Yes, but there is the huge other "but" that in modern use, a formal declaration of war is no longer necessary, committing acts of war is sufficient for a state of war to exist. (However, committing acts of war without a preceding declaration is of course a war crime.)
Of course this isn't really automatic and triggered by the smallest thing, both sides kind of have to "agree" to be at war, e.g. by a counter-attack, a declaration following the attack or something like that. And nobody really wants to take that bait, due to the huge consequences involved.
Yet, it is China playing with fire here, we all can be happy that none of the affected nations took them up on their "offer" of war.
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Yes, but there is the huge other "but" that in modern use, a formal declaration of war is no longer necessary, committing acts of war is sufficient for a state of war to exist. (However, committing acts of war without a preceding declaration is of course a war crime.)
Of course this isn't really automatic and triggered by the smallest thing, both sides kind of have to "agree" to be at war, e.g. by a counter-attack, a declaration following the attack or something like that. And nobody really wants to take that bait, due to the huge consequences involved.
Yet, it is China playing with fire here, we all can be happy that none of the affected nations took them up on their "offer" of war.