In April 1798 Emmet was expelled from Trinity. He had been exposed as the secretary of a secret college committee in support of the Society of United Irishmen of which his brother and Tone were leading executive members. Emmet did not participate in the disordered United Irish uprising when it broke out in counties to the south and north of a heavily-garrisoned Dublin in May 1798. But after the suppression of the rebellion in the summer, and in communication with state prisoners held at Fort George in Scotland (including his brother), Emmet joined William Putnam McCabe in re-establishing a United Irish organisation. They sought to reconstruct the Society on a strict military basis, with its members chosen personally by its officers' meeting as the executive directory. Following the example not only of Tone but also of James Coigly, their aim was to again solicit a French invasion on the prospective strength both of a rising in Ireland and of a radical conspiracy in Britain. To this end McCabe set out for France in December 1798, stopping first in London to renew contact with the network of English Jacobins, the United Britons.