Fence post retaining plate

A fence comprising a plurality of T-shaped fence posts, each secured to a retention plate having securing protrusions formed thereon, a lower end of the fence post and the retention plate configured to be inserted into soil to position the fence post in a desired orientation. A plate body of the retention plate comprises a plate body including central openings for receiving a plurality of the securing protrusions formed on the fence post. The plate body has a periphery with a top edge, a bottom edge and two side edges. The plate body has a plurality of additional openings therein. Also, a retention plate and a T-shaped fence post.