IDK if any of this is helpful for newbies or if it's all just redundant, but I'm seeing a lot of questions about understanding the map, so I'm going to try to throw out a bunch of stuff to see if it helps:
Explaining the map:
Red circles - Enemies
Red Double Circle - Enemy Generals (Cia, Volvagia, etc.)
Red Target - Mission Kill target (e.g. "Kill the assault squad before they reach your keep!)
Blue Circles - Friendlies
Blue Double Circle - Friendly Generals (Zelda, Link, etc.)
Blue Target - Mission Defense Target (e.g. Bombchus, other escorts)
Blinking Blue Circle - Usually somebody that's called for help on your team. If don't you go over and beat the shit out of whatever's killing them they'll probably die. If this is a mission critical NPC, you'll lose. They'll call for help once I think when they're at 50% health, and then again when they're at like 10% health. If you get near them when they've made the 2nd call, they will be healed.
Squared Off Rooms - Keeps, usually they are referred to by name that I think you'll just have to learn by heart. If they're blue colored, they're yours. If they're red, they belong to the enemy.
Diamonds - Outposts. If it's blue it's yours and spawns friendly troops. If it's red it belongs to the enemy and spawns enemy troops. Take these over opportunistically.
Speech Bubble - The location of the NPC that's currently yammering to you through text. They're prob either calling for help or delivering some flavor text that's part of the mission.
Your latest Primary Objective is listed at the top of the map. You can tap on it to view all Primary Objectives. (I don't think Secondary Objectives show up here). If you pause the game, there's a Battle Log that shows all of the messages you've received in chronological order. If you don't know what you're supposed to be doing, and the Primary Objectives didn't help, you can try looking here.
Edit:
Also, it looks like the Battlefield info option in the pause menu actually shows in which bases the treasure chests are hidden. Was that a thing in the WiiU version or is that new?
I'm pretty sure that's new, but if it's not god I feel
dumb.