[Targan]

T:2300 shows that, like WWI, the Twilight War completely failed to be The War to End All Wars. Admittedly large-scale hostilities between the major powers fizzled out after 2001 (and I don't have the 2300 books here at work with me to check) but there were some really nasty regional wars in the century after the Twilight War ended. I recall that South America had its own really vicious series of wars.

And then things really kicked off all over again once the Stutterwarp faster-than-light drive was invented - a rare element called tantalum was a key requirement of the Stutterwarp drive and many countries went to war over the very finite deposits on earth. In the medium term those countries which had access to tantalum became major space faring powers while those without had to either ally themselves to those that did or resign themselves to being terrestrial nobodies (I say medium term because in the longer term terrestrial tantalum deposits became irrelevent in the face of the vast resources available in space).

In the CONUS MilGov and CivGov finally reunited in 2020. I suspect they would not have sought to prosecute one another's war criminals, in the spirit of detente and reconciliation (and political expediency of course). I'm sure however that any New America notables in custody would have been mercilessly punished.