The U.S. State Department has approved the potential sale of an Integrated Air and Missile Defense Battle Command System to Poland for an estimated cost of $4 billion, the Pentagon said on Monday.

As it upgrades its air defenses, the Pentagon said NATO-ally Poland had requested to buy phase two of a two-phase program for the command system enabled PATRIOT Configuration-3 with modernized sensors and components.
The sale would include 93 of the system's engagement operation centers, 175 fire control network relays and other related equipment, the Pentagon said.
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European interest in U.S. weaponry has increased with demand centered around such supplies as munitions, air defenses, communications equipment, shoulder-fired Javelin missiles and drones which have proven critical to Ukraine's war efforts.
The principal contractor for the missile defense system will be Northrup Grumman, the Pentagon said in a statement.