Havermeyer grinned at the colonel’s intervention and shoved another piece of peanut brittle inside his face.
Half the bedsheet is yours because it was all yours to begin with, and I really don’t understand what you’re complaining about, since you wouldn’t have any part of it if Captain Yossarian and I hadn’t intervened in your behalf.
General Dreedle was infuriated by his intervention.
’Neither do I,’ answered Yossarian, who was ready to pursue him through all the words in the world to wring the knowledge from him if he could, but Clevinger intervened, pale, thin, and laboring for breath, a humid coating of tears already glistening in his undernourished eyes.
They even defended him the night Colonel Cathcart tried to throw him out of the officers’ club again, Yossarian rising truculently to intervene and Nately shouting out, ’Yossarian!’ to restrain him.
At the next corner a man was beating a small boy brutally in the midst of an immobile crowd of adult spectators who made no effort to intervene.
They might do whatever they wished to him, he realized; these brutal men might beat him to death right there in the basement, and no one would intervene to save him, no one, perhaps, but the devout and sympathetic major with the sharp face, who set a water tap dripping loudly into a sink and returned to the table to lay a length of heavy rubber hose down beside the brass knuckles.
There are no more uses of "intervene" in the book.