Holy Roman Empire Holy Roman Empire	Coat of arms Duchy of Poland	Victory	Otto I
German–Danish War of 974	Holy Roman Empire Holy Roman Empire	 Kingdom of Denmark
 Norwegian vasal	Victory	Otto II
Franco-German War of 978-980	Holy Roman Empire Holy Roman Empire	West Francia	Status quo ante bellum	Otto II
Otto II's raid on Poland	Holy Roman Empire Holy Roman Empire	Coat of arms Civitas Schinesghe	Defeat	Otto II
Slavic revolt of 983	Holy Roman Empire Holy Roman Empire	Wends
Lutici Obotrite

Defeat	Otto II
Polish-Saxon Invasion of Veleti (985)	Coat of arms Duchy of Poland
Holy Roman Empire Holy Roman Empire	Veleti	Victory	Otto III
Polish–Bohemian War (990)	Coat of arms Duchy of Poland
Holy Roman Empire Holy Roman Empire	 Duchy of Bohemia	Victory	Otto III
Polish-German invasion of Veleti (992)	Coat of arms Duchy of Poland
Holy Roman Empire Holy Roman Empire	Veleti	Victory	Otto III
Polish-German invasion of Obotrites (995)	Coat of arms Duchy of Poland
Holy Roman Empire Holy Roman Empire	Obotrites	Victory	Otto III
German–Polish War (1003–1018)	Holy Roman Empire Holy Roman Empire	Coat of arms Duchy of Poland	Peace of Bautzen	Henry II
Bolesław I's intervention in the Kievan succession crisis (1015–1019)	Coat of arms Duchy of Poland
Kingdom of Hungary
Holy Roman EmpireHoly Roman Empire
Pechenegs

Kievan Rus	Victory
Temporary victory for Sviatopolk and Boleslaw
Polish sack of Kiev
Henry II
German–Polish War (1028–1031)	Holy Roman EmpireHoly Roman Empire	 Kingdom of Poland
 Kingdom of Hungary (1029–1031)	Victory	Conrad II
Emperor Conrad II's military campaign against Hungary
(1030–1031)

Holy Roman EmpireHoly Roman Empire	 Kingdom of Hungary (1029–1031)	Defeat
The Hungarians occupied Vienna
Conrad II
German-Hungarian Wars (1042–1043)	Holy Roman EmpireHoly Roman Empire	 Kingdom of Hungary (1029–1031)	Victory	Henry III
Henry III's military campaign against Hungary (1044)	Holy Roman Empire Holy Roman Empire
 Peter Orseolo and his allies

 The army of King Samuel Aba	Victory
Defeat of Samuel Aba, restoration of Peter
Henry III
War between King Peter and Prince Andrew (1046)

 King Peter's army
Holy Roman Empire Holy Roman Empire

 Prince Andrew's army
Kievan Rus'

Defeat	Henry III
Emperor Henry III's military campaigns against Hungary (1051–1052)	Holy Roman Empire Holy Roman Empire
 Duchy of Bohemia

Kingdom of Hungary	Defeat	Henry III
German-Hungarian border War (1056–1058)	Holy Roman Empire Holy Roman Empire	Kingdom of Hungary	
Stalemate

Treaty of Marchfeld
Henry IV
Civil War between King Andrew I and his brother, Prince Bela (1060)	 King Andrew I's army
Holy Roman Empire Holy Roman Empire

 Prince Béla's army
Kingdom of Poland

Defeat	Henry IV
German invasion of Hungary (1063)	 Holy Roman Empire
 Duchy of Bavaria
 Kingdom of Hungary	Victory
Death of Béla I
Ascension of Solomon to the Hungarian throne
Henry IV
Saxon revolt of 1073–1075	 Holy Roman Empire	 Duchy of Saxony	Victory
Rebellion suppressed
Henry IV
Saxon revolt of 1077–1088	 Holy Roman Empire	German rebels
Duchy of Saxony
Duchy of Bavaria
County of Luxembourg
Victory	Henry IV
German-Flemish war	Holy Roman Empire Holy Roman Empire	County of Flanders	Status quo ante bellum	Henry V
Henry V's expedition to Poland	Holy Roman Empire Holy Roman Empire
 Duchy of Bohemia	 Kingdom of Poland	Defeat	Henry V
War of Bohemian Succession (1125–1140)	 Holy Roman Empire	 Duchy of Bohemia	Defeat	Lothair III
Wars of the Guelphs and Ghibellines
1125–1186
1216–1392
Ghibellines'
 Holy Roman Empire
1st phase
2nd phase
Guelphs'
 Holy See (Papacy)
1st phase
2nd phase
1st phase:Peace of Constance (1186) 2nd phase:Stalemate (1392)

Decline of free communes;rise of signorie
Diffusion of Black Death
Extinction of Hohenstaufen dynasty
Conquest of the Kingdom of Sicily by Charles of Anjou
Interregnum after Frederick II's death
Weakening of Imperial Authority over Italy
Frederick I
Barbarossa

Frederick II

Henry VII