MontanaXVI

I am working on getting the lawn in shape (just purchased first home last fall) and I have these damn purple weeds growing like crazy all over the place, and no idea what they are to address them.

If I were to post a pic, does anyone have any experience with anything like this or could possibly know what they are?

I'm asking first to gauge the responses, if someone thinks they can do it I will pic, if not then no harm no foul.

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Spank you very much