After months of tense negotiations, the U.S. and Ukraine have signed a deal that is expected to give Washington access to the country’s critical minerals and other natural resources.

The United States and Ukraine have signed an “economic partnership agreement” that will give Washington access to Kyiv’s mineral resources in exchange for establishing an investment fund in Ukraine.

The text of the agreement, made public by Ukraine’s government, made no mention of the security guarantees that Kyiv had long sought.