Ongoing warfare from the magnitude of WW1 or WW2 for four generation is more or less impossible - even a totalitarian society coudn't mobilize so many people to do that: WW2 claimed the life of 50 million people, most of them in Europe, and several millions more who died before and after the war (in the camps every totalitarian society needs to maintain a necessary level of terror to strengthen its rule) - continuing this would simply depopulate the warring nations in the long run.
However, on a smaller scale, it is very well possible IF your grip on the population is tight enough. In 1984, though it's just a piece of fiction that (though my favorite dystopian novel) should be taken with a grain of salt, the war was led in a war that it could literally continue forever. However, in this case, we had three superstates which were nor only *willing* to pay this price, but *needed* to fight forever. A RL-comparison would be what Hitler had in mind after an assumptive victory in WW2: an empire with debated frontiers in a permanent ongoing conflict in which the race of lords is hardened over and over again while conquering the world and so on. IF you have a society that praises martial prowess above all else and if you have the means to ensure that your enemies simply don't nuke you away (or can get a significant technological ladvantage), THEN probably eternal (or, in this case, a century of) warfare could be possible - however, this doesn't fit very well in a period of time which is accelerated in comparison to the time before, like the 20th century.
However, on a smaller scale, it is very well possible IF your grip on the population is tight enough. In 1984, though it's just a piece of fiction that (though my favorite dystopian novel) should be taken with a grain of salt, the war was led in a war that it could literally continue forever. However, in this case, we had three superstates which were nor only *willing* to pay this price, but *needed* to fight forever. A RL-comparison would be what Hitler had in mind after an assumptive victory in WW2: an empire with debated frontiers in a permanent ongoing conflict in which the race of lords is hardened over and over again while conquering the world and so on. IF you have a society that praises martial prowess above all else and if you have the means to ensure that your enemies simply don't nuke you away (or can get a significant technological ladvantage), THEN probably eternal (or, in this case, a century of) warfare could be possible - however, this doesn't fit very well in a period of time which is accelerated in comparison to the time before, like the 20th century.