When does Goblin Army spawn?

[Blue]

I saw a Goblin Scout, and I don't know if that's a sign of the goblin army to spawn anytime.

[Coxy]

goblin army event will spawn if you have 200+hp and have destroyed an orb.

goblins will spawn in on the other quaters of the map

[Snek]

It has a 1/3 chance to spawn every morning after you breask a Shadow Orb/Crimson Heart and a 1/30 chance after you've beaten one. Goblin Scouts are just uncommon enemies in the outer thirds of the world that drop an item that allows you to make a Goblin Battle Standard.

[Herozen]

a goblin army will have a 1 in 3 chance to spawn per day after 1 you have 200 health and 2 a shadow orb/crimson heart. has been smashed. after the first invasion its a 1 in 20 chance each day

[Gizmodious]

Here is the info from the wiki.

For a goblin invasion to occur:

* It must be daytime.
* At least one shadow orb or crimson heart must have been destroyed.
* At least one player must have 200 health or more.
* There must be no goblin invasion already in progress.

* After the spawn criteria have been met, there will be a 1/3 chance every day for the first army to invade.
* Further invasions (after the first has been defeated) have a 1/30 chance of occuring each day before hardmode begins, And a 1/60 chance afterwards.