I won't bore you with a picture of my *very* healthy crabgrass in what is sometimes known as "your weed patch." I will, though, caution folks about getting too focused on winning the fight against it.
I want to pull every crabgrass plant out of there (!), but they outnumber me So Bad! I try to pull a few stems at a time, and then I get manic and try to pull a clump at a time, but I can so easily hurt my back. I know this because I have done it.
Those roots are gooooood at what they do, which is holding on for dear life.
So be careful out there! Its rainy and cool here, which is great weather for pulling weeds, but be careful!