WARSAW—Poland signed the largest weapons procurement deal in its history on Wednesday, agreeing with the United States to buy Raytheon Co’s Patriot missile defense system for $4.75 billion as it modernizes its forces to face a bolder Russia.
“It is an extraordinary, historic moment; it is Poland’s introduction into a whole new world of state-of-the-art technology, modern weaponry, and defensive means,” Poland’s President Andrzej Duda said during the signing ceremony.
