In 21st century we are back to roman camps.
“I don’t know that US Army planners aimed to reconstruct a modernized version of the Roman playing-card fort, but the concerns of force protection for an army on the move (and then an army settling down to try to establish durable control and engage in COIN) remain largely the same and so lead to similar designs.”
https://acoup.blog/2021/12/31/collections-fortification-part-v-the-age-of-industrial-firepower/