> For the complete documentation index, see [llms.txt](https://crypto-battle.gitbook.io/litepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://crypto-battle.gitbook.io/litepaper/cryptobattle/defense-alliances.md).

# Defense Alliances

<figure><img src="https://1192031451-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtBap2yQOIM9V6PnPpIQ6%2Fuploads%2FmIqT5NGC4trtW6oP1KEt%2Fimage.png?alt=media&amp;token=f7d05878-d38b-48a7-aa0a-dac15b8788f3" alt=""><figcaption></figcaption></figure>

You can invite your friends to join the defense of the kingdom, thereby forming a defensive alliance. Defensive alliances allow you to receive additional income, each alliance will give you 8% in crystals and 4% in gold from the amount of investment of the invited participant.

\*To be able to make alliances, you must have at least one tower

**Is it possible to return the money invested in the kingdom?**

You can retreat and then you will receive the income that you would receive for 5 days of defense.