All 3 Uses

oblige
in
Alice's Adventures in Wonderland
(Edited)

'They were obliged to have him with them,' the Mock Turtle said:
Chpt 10

obliged = required (to do something)
'And that's the jury-box,' thought Alice, 'and those twelve creatures,' (she was obliged to say 'creatures,' you see, because some of them were animals, and some were birds,) 'I suppose they are the jurors.'
Chpt 11 *
She did it so quickly that the poor little juror (it was Bill, the Lizard) could not make out at all what had become of it; so, after hunting all about for it, he was obliged to write with one finger for the rest of the day; and this was of very little use, as it left no mark on the slate.
Chpt 11

Definitions:

(1) (oblige as in: I am obliged by law.)
require (obligate) to do something
(2) (oblige as in: I obliged her every request.)
grant a favor to someone
(3) (obliged as in: I'm much obliged for your kindness)
grateful or indebted
(4) (meaning too rare to warrant focus)
Much more rarely, in classic literature you may see oblige as a synonym for ask as when Jules Verne wrote "I obliged the Professor to move his lamp over the walls of the gallery," in Journey to the Center of the Earth.