Place marker stakes in the ground around the perimeter of the area you are fencing. Space the markers 4 feet apart along the perimeter. Each marker indicates the location for a fence post.
Set the bottom of a metal T-post at the location of the first marker. T-posts have hooks running down their length for attaching the wire. Set the post so the hooks are facing up.
Place a metal post driver tube over the top of the T-post. These metal tubes allow you to drive in the post without bending or damaging it.
Hold the post driver by the handles. Lift the driver up and ram it back down solidly, driving the post into the ground. Continue to pound in the T-post with the driver until the bottom 12 inches of the post are driven into the soil. Repeat for the remaining T-posts until they are all in place.
Hook one end of the galvanized wire mesh over the hooks in the first T-post. Pull the fence to the next post, stretching it taut, and hook it in place. Continue stretching and hooking the fence until the wire is attached to all the posts.
Trim any excess fencing off after the last post. Use wire clippers to cut through the mesh. Make the cuts flush with a vertical wire running up the fencing, otherwise sharp wire ends can snag onto or cut people and animals.