The war over Taiwan wouldn't be done by soldiers on Taiwanese soil. So you wouldn't need many boots on the ground in a literal sense.
But if you mean in a metaphorical sense, how long until the 7th Fleet could get to Taiwan, the answer is 0 days for first response, 3 days for everything located in Japan, and less than a week for the full mobilization of the 7th Fleet (that's 50+ ships and nearly 30K soldiers). The entire Pacific fleet could be there in a week and a half.
(Granted, we're assuming competent US leadership, which is not the current administration.)
The war over Taiwan wouldn't be done by soldiers on Taiwanese soil. So you wouldn't need many boots on the ground in a literal sense.
But if you mean in a metaphorical sense, how long until the 7th Fleet could get to Taiwan, the answer is 0 days for first response, 3 days for everything located in Japan, and less than a week for the full mobilization of the 7th Fleet (that's 50+ ships and nearly 30K soldiers). The entire Pacific fleet could be there in a week and a half.
(Granted, we're assuming competent US leadership, which is not the current administration.)