Better known to the public than Lenin, chaired the Petrograd Soviet from 25th September, was a charismatic speaker and tactician
Persuaded Lenin to seize power whilst the All Russian Congress of Soviets was actually taking place, not before it met
He took over organisation of the Military Revolutionary Committee, set up by Petro Soviet to defend Petrograd against advancing Germans.
used it as a smokescreen to hide his preparations for takeover
Persuaded the Petrograd Garrison to support the takeover, w/o support of soldiers they would not have been successful
Trotsky persuaded the Soviet to take advantage of the unrest from Kerensky's order of 5th Oct mobilising Petrograd troops for the front line to form a Military Revolutionary Committee
sent speakers into factories to get support for uprising
sent MRC commissioners to get Petrograd garrison units to ensure soldier support
He organised the actual seizure of power on 25-26 Oct
Used the opportunity of the SR and Mensh walk out of the All Russian Congress to block the chance of a coalition saying they walked 'into the dustbin of history'