 Schillmöller left the group for Manado on 23 March, while a detachment of 50 Japanese soldiers was sent to Poso to bring his group back to Manado.De Jong and van Daalen, however, rejected the demand to surrender their weapons and turned back on their decision to capitulate.When the Japanese detachment arrived in April, the Dutch opened fire at them, killing the detachment commander and wounding others.