The Troop Quarters is the building that allows you to store troops in The Lost City and The Abyssal Palace. You have five Troop Quarters in each outpost, and it is not possible to build any more Troop Quarters or to disintegrate any of the Troop Quarters.
Every upgrade of a Troop Quarters allows you to have more troops in your outpost at once. You need Eternal Runes to upgrade Troops Quarters in The Lost City and Coral Doubloons to upgrade Troop Quarters in The Abyssal Palace.
You can get more/less troops in the outpost by warping them from/to the main city using the outpost warp gate. You can not warp more troops than you are able to store.
Here are a table of the stats of Troops Quarters:
|Level||Building Time||Eternal Runes/Coral Doubloons
required to upgrade
|Troop capacity||Power gained|
|2||1h 35m 0s||10||7,500||120|
|5||12h 40m 0s||50||15,000||960|
|6||1d 1h 20m 0s||70||25,000||1,920|
|7||2d 2h 40m 0s||100||50,000||3,840|
|8||4d 5h 20m 0s||200||100,000||7,680|
|9||8d 10h 40m 0s||350||150,000||15,360|
|11||17d 8h 40m 0s||600||400,000||61,440|
|12||17d 8h 40m 0s||700||450,000||122,880|
|13||17d 8h 40m 0s||800||510,000||245,760|
|14||17d 8h 40m 0s||900||580,000||491,520|
|15||17d 8h 40m 0s||1,000||650,000||983,040|