Help get troops

Hello , i have a q . how do i will get marines , submarines , anti-aircraft or other troops that are showed in videos in "help menu" but i don't have them how do i get them?

You must first have the correct amount of SP,, but you can check upgrades in player profile.

To get the go to: Player Profile ( Top Left Corner) > Than select the button that says upgrades and view them all > Buy them when you have enough SP.