[1] His grandfather, Charles I de Blanchefort (1578–1638), was a trusted advisor to Louis XIII and a Marshal of France, who commanded French troops at the 1636 victory of Tornavento; his father died at the siege of Chambéry in 1630.

[2] His eldest brother Charles (1623–1687) was one of Louis XIV's closest counsellors, whose wife served as chief Lady-in-waiting to Queen Maria Theresa of Spain.

The internal tensions that resulted culminated in 1648 with the Fronde, a struggle for control between regional magnates like Condé, and a Court party headed by Anne of Austria, mother of the 8 year old Louis XIV, and Cardinal Mazarin.

[4] Shortly afterwards, de Créquy purchased the Chateau of Marines, adding formal gardens by André Le Nôtre, the leading landscape designer of the period; it remained in the family until 1714 and was painted by Paul Cézanne in 1890.

[5] In September 1667 during the War of Devolution, a French army captured the strategic town of Lille; the Spanish relief force arrived too late and Turenne detached cavalry under Bellefonds and de Créquy to cut off their retreat.

[6] Despite capturing large areas of the Spanish Netherlands, a Dutch-led coalition forced France to return most of their gains in the Treaty of Aix-la-Chapelle (1668) and Louis began plans to attack the Republic directly.

De Créquy was instructed to avoid battle and ensure the retention of Freiburg, which he had taken by surprise in November 1677 and was now threatened by an Imperial army of 30,000 under Charles V, Duke of Lorraine.

[14] This success partially restored his reputation and in 1681 he supervised the siege of the Fortress of Luxembourg, withdrawing after France annexed Strasbourg before capturing it during the War of the Reunions in 1684.