The conflict between Maurice and the States of Holland, led by Oldenbarnevelt and Grotius, about the Sharp Resolution and Holland's refusal to allow a National Synod, came to a head in July 1619 when a majority in the States General authorized Maurice to disband the auxiliary troops in Utrecht. Grotius went on a mission to the States of Utrecht to stiffen their resistance against this move, but Maurice prevailed. The States General then authorized him to arrest Oldenbarnevelt, Grotius and Rombout Hogerbeets on 29 August 1618. They were tried by a court of delegated judges from the States General. Van Oldenbarnevelt was sentenced to death and was beheaded in 1619. Grotius was sentenced to life imprisonment and transferred to Loevestein Castle.