Secretary of State Mike Pompeo was in Poland Saturday at the conclusion of a four-nation tour of Europe, where crucially he inked a new defense pact with the Eastern European country at a moment Russia has consistently been accusing Washington of provocative and ‘irresponsible’ military build-up along its western border.

“Today, my Administration signed a historic Enhanced Defense Cooperation Agreement with the Republic of Poland,” President Trump said in a written White House statement, The Hill reports. “This agreement is the culmination of months of negotiations with our Polish allies following the two joint declarations I signed with President Duda last year.”

Sure to anger the Kremlin further is the key detail in the deal which adds at least 1,000 more American troops to Poland.

Though a somewhat small addition, taking the current some 4,500 US troops stationed in Poland to at least 5,500 as part of the new pact, it’s hugely symbolic in terms of Pentagon plans in the former Soviet-satellite country.

In announcing the agreement Trump’s statement underscored American troop presence in Poland will “further strengthen NATO deterrence, bolster European security, and help ensure democracy, freedom, and sovereignty.”

It comes in the wake of Trump’s controversial Germany draw down, which Secretary of Defense Mark Esper earlier this month cast as having the benefit of reinforcing NATO’s south-eastern flank near the Black Sea, due to the redistribution of American forces. It’s expected that many could go to Baltic countries as well as Italy