In 2020, Poland concluded an agreement with the United States on enhanced defence cooperation (EDCA). It assumes that Warsaw will participate in part of the costs associated with the current presence of US troops, and will besides undertake to grow the infrastructure intended for usage by US and Polish troops. [The ratification act is at this link.](https://orka.sejm.gov.pl/Druki9ka.nsf/0/04B20FEBA58B0D11C12585D00030C43A/%24File/573.pdf)