President Donald Trump confirmed that the U.S. and Poland have signed a "joint declaration" to advance military cooperation, including buying F-35 fighters and United States liquefied natural gas, amid concerns about relations with Russian Federation.
Speaking to reporters, Mr Duda thanked Mr Trump for his "extreme kindness towards Poland and flawless understanding of Polish matters".
The sides also agreed to set up an aerial port of debarkation "to support the movement of forces for training or contingency"; an area support group; a USA special operations forces group to support various operations; and infrastructure to back the presence of "an armored brigade combat team, a combat aviation brigade, and a combat sustainment support battalion" in Poland. "The Polish government will pay for this".
Also Wednesday, Trump dismissed the suggestion that his administration's deal with Mexico not to impose tariffs in return for more border protection efforts had been negotiated months ago. There are now about 4,500 US troops that routinely rotate in and out of Poland.
The decision to expand America's military presence in Poland comes after months of lobbying by Polish leaders who had hoped for a US base in their country.
The troop decision is aimed at boosting US-Poland military-to-military relationships and will be a boon to Poland, which has sought to bolster its deterrence of Russian aggression, though Trump did not characterize the deployment as a measure to deter Russia. He offered no timetable for when the additional military personnel would begin arriving in Poland.
It was not practical to give Polish President Andrzej Duda a ride in a U.S-made F-35 fighter jet, so President Donald Trump did the next best thing - he had one of the pricey planes fly over the White House for Duda to see. Duda looked up and waved at the passing jet.
Addressing reporters in the White House Rose Garden after a day of meetings, Trump announced a memorandum of military co-operation, saying, "As the declaration makes very clear, the United States and Poland are not only bound by a strategic partnership but deep common values, shared goals and a very strong and abiding friendship".
The U.S. resumed increasing its military activity in Europe in concert with North Atlantic Treaty Organisation allies following Russia's annexation of Ukraine's Crimean Peninsula in 2014.
Pressed on the point, Duda said: "There is no problem with democracy in Poland".