The self-proclaimed military leader of the Islamist group Jemaah Islamiah (JI) has gone on trial in Jakarta.
Abu Dujana is accused of aiding other senior militants
Abu Dujana, 37, is accused of "plotting terrorist activities" and sheltering senior militants. He could face the death penalty if found guilty.
His arrest, in June, was seen as a huge victory for Indonesia's fight against Islamic militants.
JI's leader Zarkasih was arrested on the same day as Abu Dujana, and will go on trial next Monday.
JI is accused of carrying out a string of attacks in South East Asia, including the Bali bombings of 2002, which killed 202 people, mostly foreign tourists.
Ammunition and explosives
The 35-page indictment against Abu Dujana accuses him of authorising shipments of explosives to attack Christians in Poso in central Sulawesi, an area fraught by inter-religious tensions.
Prosecutor Bayu Adi Nugroho told the Jakarta court that Abu Dujana also sheltered and aided other senior militants, including Malaysians Noordin Mohamed Top and Azahari Husin.
Azahari was killed in a police raid two years ago, but Noordin is still on the run.
Abu Dujana was not charged with any specific bombing attacks, but the court heard that he had been made head of JI's military wing in May 2004.
"The defendant and his friends conspired to commit criminal terrorist activities from 2004-2007," said prosecutor Payaman.
They "possessed, delivered and ordered deliveries of ammunition and explosives to carry out terrorist attacks," he said.
Abu Dujana's trial has now been adjourned until next week.
As well as the 2002 Bali bombings, JI is also accused of an attack on the Australian embassy in Jakarta in 2004, as well as a car bombing at the city's Marriot hotel a year earlier.
The shadowy militant organisation, which is believed to be seeking a pan-Islamic state in South East Asia, has suffered serious set-backs in recent years with the arrest and death of many of its senior members.