How can I get rid of this

Hi everyone,

I’ve got this plant growing like crazy on the edge of my lawn and garden bed. It’s spreading rapidly and seems to have a lot of roots underground. I’ve tried searching online, but none of the common weeds like purslane, oxalis, or spurge seem to match.

Has anyone dealt with this before? Any tips on identifying and getting rid of it? Ideally, I’d like to control it without damaging the rest of my lawn.

Thanks in advance!