Also asked, why did District 13 get destroyed?
It was destroyed during the First Rebellion when the united districts of Panem rebelled against the Capitol’s oppressive rule. Near the end of the war, District 13 trained nuclear missiles on the Capitol, hoping to destroy the Capitol even if the result was mutually assured destruction .
Additionally, what was District 13’s industry? According to reports, District 13’s industry was supposedly graphite mining — though this was actually a cover for its main industry, developing nuclear technology.
Similarly one may ask, what bargain did District 13 make with the Capitol?
During the Dark Days, the rebels in District 13 trained their nuclear missiles on the Capitol and struck a bargain : District 13 would metaphorically “play dead” if the Capitol left them alone.
What happened to the kids in District 13?
District 13 was supposedly bombed and destroyed before the first annual Hunger Games at the end of the Dark Days war, but it was hinted in Catching Fire that they had survived and in Mockingjay it is confirmed that District 13 had become, literally, an underground district when the population retreated to bunkers.