The government would have deployed the US military (they sent special forces, the CIA, and mercenaries instead) to Ukraine if it wasn't afraid of intense backlash.

However, the media and politicians have been preparing the public for a war with China for a decade. I'm unsure if they thought they could cultivate patriotism and enlistments or if they're too detached to realize public resentment.

Military recruitment has struggled to find eligible young Americans because obesity, drugs, and mental health impact most people, but the requirements might change.

American society will collapse if the US drafts young people.