Do you need to play Fire Emblem: Three Houses before playing Fire

Now that Fire Emblem Engage is available, the question of whether or not you really need to first play Fire Emblem: Three Houses before tackling Alear’s adventure on the Nintendo Switch, has come up.
Now that Fire Emblem Engage is available, the question of whether or not you really need to first play Fire Emblem: Three Houses before tackling Alear’s adventure on the Nintendo Switch, has come up.

Can I play Fire Emblem: Three Houses if I've never played Fire Emblem before? Will the story be confusing? - Quora

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A great infographic showing a breakdown of the four different story routes to choose from in Fire Emblem: Three Houses : r/NintendoSwitch