"Surface-to-air missiles"@en . "-30"^^ . . "1"^^ . "Wood"@en . "5"^^ . . "Base defense"@en . "2"^^ . . . . . "Surface-to-air missile battery upgrade"@en . "These were constructed throughout GDI bases as their main means of anti-air defense. They had to be protected from ground threats, however. The new AA Battery replaced the SAM upgrade after the Firestorm Crisis, as it was cheaper and easier to maintain."@en . "Surface-to-Air Missile Battery Upgrade"@en . "33"^^ . . . "0"^^ . . "300.0"^^ . . . . "10"^^ . "These were constructed throughout GDI bases as their main means of anti-air defense. They had to be protected from ground threats, however. The new AA Battery replaced the SAM upgrade after the Firestorm Crisis, as it was cheaper and easier to maintain."@en . "15"^^ . . "55"^^ . "100"^^ . .