23. Spain
To ensure the independence and sovereignty of the Kingdom of Spain, the Spanish Armed Forces has for the air, seas and land covered. They have their Army, Air and Space Force, Military Emergencies Unit, Common Corps and the Royal Guard. The 133,282 active serving personnel have joined the military voluntarily. In 2021, they spent 1.4% of their GDP on their military, with their annual budget clocking in at $19.5 billion. Spain joined NATO in 1982 and send their troops for missions with the UN, NATO and European Union.