 Kuitira kuderedza pesvedzero yevatengesi veBritain, Spain yakatangazve kuedza kukurudzira vagari vemuFrance kuti vabve muIllinois vachienda kuMissouri, uye muna 1778, vaSpanish vakapa nyika uye zvinhu zvinokosha kuvapoteri veKaturike kuMissouri; zvisinei, vagari vashoma vakatora zvirokwazvo zvipo zvokutamira kunharaunda yacho. Kuedza kwechipiri kwevaSpanish kurwisa vaBritain kwakabudirira zvikuru: kutanga mukupera kwema1770, vakuru vakuru veSpain vakatanga kutsigira pachena vapanduki veAmerica vairwisa kutonga kweBritain muHondo yeAmerican yeRusununguko. Vakuru vakuru veSpain muSt. Louis neSt. Genevieve akabatsira zvikuru pakupa George Rogers Clark zvokudya panguva yaaiva muIllinoisra1779. 