Movellan Incident

The Battle for the Movellan ship occured when the Daleks and Movellans arrived on Skaro during their war. The Daleks wanted to find their creator, Davros, to help them win the war while the Movellans wanted to destroy Skaro. The battle happened when Davros was rivived and sent his Daleks, strapped with explosives, to destroy the Movellan ship. (DW: Destiny of the Daleks)

Events leading to the battle
When the Doctor held Davros hostage, he demanded all Dalek prisoners be let go. The fourty odd humans were released. The Doctor then escaped and Davros planned to evacuate Skaro before the Movellans could attack.

The Movellans, at the time, were programming their nova device. This bomb would ignite the atmosphere, destroying Skaro. While a signal had been sent to a deep space cruiser to come to Skaro, Davros armed ten or so Daleks with explosives. Before the Movellan ship could ever take off, the Daleks, carrying more than half a megaton of explosives, would press against the hull and Davros would detonate. (DW: Destiny of the Daleks)

The Conflict
Lead by Tyssan, and with help form the Doctor, the Humans reprogrammed two Movellans and then took full control of their ship, planning to leave Skaro as they were unaware of the Dalek force approaching. Davros did not know this and belived it was manned still by Movellans and the Doctor.

The Humans armed themselves with Movellan weapons and Tyssan commanded a charge on the Daleks. The Daleks open fired, the Humans' weapons making no impact on them.

Off the battlefield, Davros had the detonator with him, ready to destroy the ship. The Doctor found his way into the Dalek base and saw Davros, only to be held at gunpoint by another Dalek. He blinded the Dalek by throwing his hat on its eyestalk. As it fired around the control centre, nearly hitting Davros, the Doctor threw another explosive on its casing and pushed it down a hall, exploding.

Tricking Davros, the Doctor detonated the explosives and the Daleks, still engaged in the fighting, exploded. (DW: Destiny of the Daleks)

Aftermath
The cruiser never arrived and the nova device was never activated. The Humans and the reprogrammed Movellans left Skaro to meet with a high security ship from Earth. Davros, their prisoner, was placed in a cryogenic freezer and was to be put on trial for his crimes against the whole of sentient creation. (DW: Destiny of the Daleks)