He imitated the action of a man’s being impelled forward by the butt-ends of muskets.
Since I knew you, I have been troubled by a remorse that I thought would never reproach me again, and have heard whispers from old voices impelling me upward, that I thought were silent for ever.
Impelled by a laudable ambition to study the art and mystery of his father’s honest calling, Young Jerry, keeping as close to house fronts, walls, and doorways, as his eyes were close to one another, held his honoured parent in view.
There are no more uses of "impel" in the book.
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When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another ... that they should declare the causes which impel them to the separation.
Thomas Jefferson -- The Declaration of Independence
The only explanation which I could think of for this mass exodus was that I had somehow disturbed the wolves so seriously they had felt impelled to abandon their den.