Who really placed the order for clone army?

When the Sith were revealed to have returned during the Invasion of Naboo in 32 BBY, Master Sifo-Dyas secretly commissioned the creation of a clone army, placing an order with the Kaminoan government before he was murdered by his friend, Count Dooku.

Who was Master Sifo-Dyas?

Masters. Sifo-Dyas was a human male Jedi Master from Minashee who commissioned the Kaminoans’ creation of the Grand Army of the Republic over a decade before the Clone Wars.