Final answer:
The Netherlands, or the Dutch Republic, was the country that created the Union of Utrecht, breaking away from Spanish control in 1581. The Treaty of Utrecht in 1713, however, was a separate event marking the end of Queen Anne's War, resulting in territorial gains for Great Britain in North America.
Step-by-step explanation:
The Union of Utrecht and the Break with Spain
The country that concluded the Union of Utrecht, breaking with Spain, was the Netherlands. In 1581, the seven northern provinces declared their independence from Spanish rule, establishing the Dutch Republic. This union was a direct response to Spanish suppression and a part of the larger Eighty Years' War that led to Dutch independence. The Union of Utrecht became a crucial moment in European history, signifying the decline of Spanish power and the rise of the Dutch as a significant power, especially in maritime commerce and trade.
The Treaty of Utrecht in 1713, however, ended Queen Anne's War between France and Great Britain. As a result of this treaty, Great Britain gained territories in North America, including Acadia and Newfoundland, and rights to the Atlantic slave trade, marking a shift in the balance of power in favor of Britain across the North Atlantic.