The link provides a good overview of this weed.

Here is a link that might be useful: Creeping Charlie link

That information from the University of Wisconsin is good, even though they are strong advocates of spraying this stuff with unnecessary poisons. Correcting your soil conditions, as the article suggests toward the beginning, will go a long way to reduce the amount of this plant that is growing in your yard. Where it does grow in my yard I simply pull the young plants, even though I sometimes still have difficulty telling the difference between these and the mallows early on.