Sobkowiak-Czarnecka, Defence Minister Władysław Kosiniak-Kamysz and Deputy Defence Minister Paweł Zalewski visited Washington this week, where they met with US Defence Secretary Pete Hegseth on Tuesday.
The talks included the possibility of a permanent US military presence in Poland.
After the meeting, Kosiniak-Kamysz said the Pentagon had given a "green light" to the proposal.
Asked by Polish private broadcaster TVN24 when the final decision might be made, Sobkowiak-Czarnecka said the Polish officials were told in Washington that the first days of December, specifically December 3 or 4, were when US President Donald Trump was expected to review the plan.
She also said the location of the proposed base had nearly been selected but declined to give further details.
"Western Poland, and I won't say anything more," she told TVN24.
The United States is conducting a six-month review of its military presence in Europe, a procedure that is due to be completed by the end of the year.
Decisions resulting from the review are expected to affect US forces in Germany, Italy and Spain most significantly, with some troops potentially moved to NATO's eastern flank, Polish state news agency PAP reported.
The review could also lead to a decision to establish a permanent US Army base in Poland.
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Source: IAR/PAP