What are some ways that egyptians gained wealth and land during the middle kingdom

Here are several ways that they use to gained wealth and land at that time:

- Conquering other kingdoms

When Egypt conquered other kingdoms, the wealth and land that previously owned by those kingdoms would transfer its ownership to the Egyptians.

- Conducting trades with other empire

Egyptians collect the commodities that cheap in their territory and sold it in a higher price.

- Forming an alliance with other kingdom

One of the method that they commonly used is through marrying one of their nobles with the nobles of larger kingdom to gain wealth and influence.

the allies overtook outlying islands to make access to japan easier.

if interdependence implies a two-way dependence, and if each partner is equally dependent on the other for success, then there is an equal commitment to the making the partnership successful. the advantage is sustainability of the relationship, the disadvantage is that decisions are "democratic" and therefore may take longer to reach and more likely to be a compromise (which is not always the best solution). as the interdependence moves away from equality, the decisions become more influenced by the more independent partner. in the extreme the relationship becomes more dictatorial and more like "master-slave". generally the relationship has less commitment in both directions and is more likely to be temporary.

if one generalizes (and one shouldn't), equity partnerships, which is probably what is implied by interdependence, can be slow to progress or change but durable. the extreme alternative, independent-dependent partnerships tend to be efficient but more fragile.

hope this but you will have to site your own evidence. : )