Defensive Training Group blog is back on its feet, at least for the time being.
And it should be something you've already done, but you should be making copies of anything on the intarwebz you think may be useful, as it may not be a forever thing.
E.g., any 200 or so US military manuals free for the asking, other than bandwidth.
The savvy will also put them on thumb drives, then hie thenceward to a copy shop and make hard copies.
The really savvy have already done so, and are now putting the whole library on thumb drives to hand out to others who may find them useful. And fear nothing about copyrights; you paid for them with your tax dollars, and they're yours and everyones', by right and by law. People charging more than the cost of printing and shipping are simply living on the margin best described by P.T. Barnum, relating to "one born every minute".
If you haven't done any of this, it's a good time to get busy.