# Brigade Contract

**Contracts** are needed for your **brigades** to be eligible to attend expeditions.

Each brigade has the number of explorers that you have entered to it, **contracts** must be paid to each of the explorers that are in your brigade, your **brigades** can be hired for a minimum of 7 days, but you can also hire them for 15 or even 30 days, once their contract expires, you must hire them again if you want to be able to go on expeditions. 

It is not possible to dismantle **brigades** with an active contract. 

When trying to add explorers to a brigade with an active contract, you will have to pay the equivalent of the available contract days of the brigade to be able to join it. 

{% hint style="info" %}
For example, if you have a brigade with 3 active contract days, and you add a new explorer, this explorer will have to pay 0.5 USD + 3 USD (3 contract days) in **$EPK** to join that brigade and be able to mine.
{% endhint %}

The cost of **hiring** your brigade is **1$** for each explorer in it, obtaining a small benefit if you hire it for more days:

| Days    | Contract cost per explorer                            |
| ------- | ----------------------------------------------------- |
| 7 days  | $7 USD - Paid in $EPK depending on the Oracle Price.  |
| 15 days | $14 USD - Paid in $EPK depending on the Oracle Price. |
| 30 days | $27 USD - Paid in $EPK depending on the Oracle Price. |