While driving truck just shut down with no power anywhere

1998 Chevrolet S-10 110,000 4.3. It first happened last year where the car wouldn't turn over at all and no power was going anywhere. I waited 5 minutes and then it started. Next I changed the battery about 5-6 months later because it was dead. Last week I was driving and the car just shutdown with no power anywhere. I turned the key back and started it again and it started up no problem. Now today I went outside, tried to start it and it got power for .5 of a second but never turned over. Now there is no power at all and no turnover whatsoever. any assistance would be greatly appreciated. Thanks in advance.