What country most recently joined NATO?
Finland is the most recent country to join NATO, formally becoming a member on 4 April 2023. It is the 31st country to join the North Atlantic Treaty Organization.
<START_INST>What country most recently joined NATO?<END_INST><START_CTX><END_CTX><START_A>Finland is the most recent country to join NATO, formally becoming a member on 4 April 2023. It is the 31st country to join the North Atlantic Treaty Organization.<END_A>