Backyard Weed that is taking over the back yard and growing over to my neighbors
The weed looks like ground ivy. Here is our website for identification and control. http://extension.umd.edu/hgic/ground-ivy
If your lawn is over 50% ground ivy, you may want to consider renovation. This is best tackled in the late summer. Here is our page on lawn renovation http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG102%20Lawn%20Estab...
it is just in one corner of my yard.
The same control methods, listed on the weed page linked above would apply.