Fake news
If you click on the link on post #1 you can hear President Trump say it himself.
"We're mobilizing our military and other forces but we're mobilizing our military on the basis that we do have a vaccine. You know, it's a massive job to give this vaccine. Our military is now being mobilized so at the end of the year we're going to be able to give it to a lot of people very, very rapidly," the president said.