Tretivuárakríggið var ein røð av bardøgum í Miðevropa tíðarskeiðið frá 1618 til 1648 og vardi í tretivu ár. Talan var um ein av teimum bardøgum, ið hava vart longst, og ein av teimum mest deyðiligu bardøgunum í evropeiskari søgu.
- At war with Spain 1625–30 (and France 1627–29). 6000 Englishmen also fought under Charles Morgan in the Danish campaigns. These were largely drawn from the famous English brigade of four regiments which were based in the Dutch Republic
- Scotland declared war and fought against Spain 1625–30 and France 1627–29, mostly conducting the war at sea. In addition to providing 2000 troops for the campaign against France in 1627, Scottish privateers harried French shipping and captured and occupied Nova Scotia, Cape Breton and Quebec. The Scottish Privy Council also provided warrants for 13,700 troops for Danish service who fought under Scottish flag with a Dannerbrog in the top left corner. These were led initially by the Catholic Robert Maxwell, Earl of Nithsdale and more famously by Donald Mackay Lord Reay. In 1630, 8000 more Britons, mostly Scots led by James 3rd Marquis Hamilton landed in Germany under British flag. They wre explicitly called the "British army" and had been raised on warrants issued by the English and Scottish Privy councils for allied service alongside Sweden. They joined an estimated 12,000 Scots already in Swedish service commanded by General Sir James Spens, Alexander Leslie, Patrick Ruthven and John Hepburn. The latter man led a Scottish brigade in France from 1634-1636 after which it fell under the control of the Douglas family. Throughout the entire period of the war, the Scots maintained a brigade of three regiments in Dutch service. The 1625-1638 period represents the period of greatest engagement, though Scots were active as allies in the anti-Habsburg alliance throughout the whole course of the war
- "into line with army of Gabriel Bethlen in 1620." Ágnes Várkonyi: Age of the Reforms, Magyar Könyvklub publisher, 1999. ISBN 963-547-070-3
- Russland stuðlaði Svøríki móti Póllandi-Litava (Smolenska kríggið)
- Ervin Liptai: Military history of Hungary, Zrínyi Military Publisher, 1985. ISBN 9633263379
- Hussar (Huszár) hu.wikipedia
- Denmark fought Sweden and the Dutch Republic in the Torstenson War
- Helmolt, Hans Ferdinand (1903). The World's History: Western Europe to 1800. W. Heinemann. p. 573. ISBN 0-217-96566-0.
- Swedish intervention
- Danish intervention
- page 54 http://www.pikeandshotsociety.org/documents/article4.pdf "When the dutch army was increased to 77 000 in 1629 during the threatened Spanish invasion..."
- Gabriel Bethlen's army numbered 5 000 Hungarian pikemen and 1 000 German mercenary, with the anti-Habsburg Hungarian rebels numbered together approx. 35 000 men. László Markó: The Great Honors of the Hungarian State (A Magyar Állam Főméltóságai), Magyar Könyvklub 2000. ISBN 963-547-085-1
- László Markó: The Great Honors of the Hungarian State (A Magyar Állam Főméltóságai), Magyar Könyvklub 2000. ISBN 963-547-085-1
- Davis, Norman (1996). Europe, a history. Oxford University Press. p. 568. ISBN 978-0-7126-6633-6.
- "Thirty Years War". www.infoplease.com. http://www.infoplease.com/ce6/history/A0848495.html. Heintað 24 May 2008.