On 16 March 1586, Van Oldenbarnevelt, in succession to
Paulus Buys, became
Land's Advocate of Holland for the
States of Holland and West Friesland, an office he held for 32 years. This great office, given to a man of commanding ability and industry, offered unbounded influence in a multi-headed republic without any central executive authority. Though nominally the servant of the States of Holland, Van Oldenbarnevelt made himself the political personification of the province which bore more than half the entire charge of the union. As mouthpiece of the
ridderschap (College of Nobles), with one vote in the States of Holland, he practically dominated that assembly. In a brief period, he became entrusted with such large and far-reaching authority in all details of administration, that he became the virtual
Prime minister of the Dutch republic. During the two critical years following the withdrawal of Leicester, the Advocate's statesmanship kept the United Provinces from collapsing under their own inherent separatist tendencies. This prevented the United Provinces from becoming an easy conquest for the formidable army of
Alexander of Parma. Also of good fortune for the Netherlands, the attention of
Philip II of Spain was at its greatest weakness, instead focused on a contemplated
invasion of England. Spain's lack of attention coupled with the United Province's lack of central, organized government allowed Van Oldenbarnevelt to gain control of administrative affairs. His task was made easier by receiving whole-hearted support from Maurice of Nassau, who, after 1589, held the office of
Stadholderate of five provinces. He was also Captain-General and Admiral of the Union. The interests and ambitions of Van Oldenbarnevelt and Maurice did not clash. Indeed, Maurice's thoughts were centered on training and leading armies, and he had no special capacity as a statesman or desire for politics. Their first rift came in 1600, when Maurice was forced against his will by the States-General, under the Advocate's influence, to undertake a military expedition to
Flanders. The expedition was saved from disaster by desperate efforts that ended in victory at the
Battle of Nieuwpoort. After 1598, Van Oldenbarnevelt took part in special diplomatic missions to King
Henry IV of France and Queen
Elizabeth I of England, and again in 1605 in a special mission sent to congratulate King
James I of England on his accession. He initiated and brokered the action that founded the
Dutch East India Company (VOC) amalgamating half a dozen companies that traded on the Far East (the first from 1595) into one in 1602. The VOC would trade for two centuries. In 1612 the VOC developed the model for the corporation of using joint stock ownership by share holders, who could only get their investment back by selling its shares at a stock exchange, also an Oldenbarnevelt initiative. The basic principle of the model was over time adopted worldwide. As the leader of the delegation of Holland in the States-General Oldenbarnevelt also dominated Dutch diplomacy. He led the negotiations with the
Spanish Crown which led to the
Twelve Years' Truce in 1609. This increased the rift with Maurice, who was opposed to the truce. Contrary to Maurice, Van Oldenbarnevelt was also in favour of provinces retaining their autonomy. == Religious conflict in the Netherlands ==