General aviation pilot reported a near miss with a military helicopter while entering the traffic pattern at a non-towered airport. Reporter was able to safely maneuver away and noted the military aircraft using civilian fields for training overwhelms and creates constant conflict with civilian traffic.

Narrative

I was approaching 79J from the southwest. I stated my intentions on CTAF that I would cross 1500 AGL midfield to set up for a left downwind or 45 to a left downwind for Runway 12 per the Aeronautical Informational Manual (AIM). There was a military helicopter on the 45 for the downwind for Runway 12. The military helicopter should have been at pattern altitude which was 1300 MSL. Instead they were at 1500 MSL; 200 feet high and although I never saw the helicopter; my traffic display showed that we were only separated by 300 ft. I immediately turned to the right and initiated a full power climb to get away from the traffic and left the area.There is a SERIOUS safety issue around this area with the military training flights. They overwhelm the outlying civilian fields and create constant conflict with civilian traffic. Military airplanes should be training at the numerous military airfields in the area. Combine this with the fact that most of the airports in the area do not have control towers; this is a tragedy waiting to happen. The military and FAA need to take steps to move or reduce the number of military training traffic at these airports. The traffic patterns are just way too busy when you add the civilian traffic. There is no reason the military training flights cannot use the military airports in the area.