This is the timeline for the site
1230 - Fourth great ninja war
1235 - Ten tails revived
(Note: This has not happened in the manga but because IDK what happened I am going with this)
1236 - Akatsuki killed
1237 - Ten tails sealed and the Host made the Nine other tails once more making a total of 11 Bijuu (Ten, Nine, Eight, Seven, Six, Five, Four, Three, Two, One, Zero tailed) using a special jutsu which died with him and now leaving the eleven Bijuu on a rampage.
1253 - A new generation born and a rise of a new deception