This is the best summary I've found and it comes from the washington Post.
At Height of Vietnam Bush Picks Guard
Washingtonpost.com: At Height of Vietnam, Bush Picks Guard
It was May 27, 1968, at the height of the Vietnam War. Bush was 12 days away from losing his student deferment from the draft at a time when Americans were dying in combat at the rate of 350 a week. The unit Bush wanted to join offered him the chance to fulfill his military commitment at a base in Texas. It was seen as an escape route from Vietnam by many men his age, and usually had a long waiting list.
Bush had scored only 25 percent on a "pilot aptitude" test, the lowest acceptable grade. But his father was then a congressman from Houston, and the commanders of the Texas Guard clearly had an appreciation of politics.
Staudt and other Guard commanders insist no favoritism was shown to him. But others active in Texas politics in the 1960s say the Texas National Guard was open to string-pulling by the well-connected, and there are charges that the then-speaker of the Texas legislature helped George W. gain admittance.
In addition to Bush and Bentsen, many socially or politically prominent young men were admitted to the Air Guard, according to former officials; they included the son of then-Sen. John Tower and at least seven members of the Dallas Cowboys.
[emoji38]. Doesn't prove his father got him in the National Guard. Speculation is proof of nothing.
Sent from my iPad using Tapatalk