Apply a big texture on several little meshes

Hello there,
I’v got a map in blender made of several little meshes (= the countries) and ONE png of the entire world that I would like to use as a texture (it displays the deserts, the mountains pf the world).
I would like to apply that texture on my map, therefore on all these different meshes…
Is it possible to do such a thing ?

Sorry for that newbie question … I just found a video with the exact answer :