What is this weed?

Located in northern Ohio region. It popped up in my gardens and paths ~3 years ago and has been a pain to control. Starts popping up late winter, blooms into early spring, and will stick around all summer. Another round pops up when weather cools off in the fall. The gravel in the picture is pea gravel- very teeny tiny plant and flowers. It blankets an entire area very quickly. Does seem to have clusters and is relatively shallowly-rooted.

Thanks in advance!