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- Battle of Paardeberg - 1900 - Second Boer War
- Battle of Pakozd - 1848 - Hungarian Revolution of 1848
- Battle of Pampeluna (778) - Charlemagne's War against the Moors
- Battle of Pampeluna (1521) - French-Spanish Wars
- Battle of Pampeluna (1813) - Peninsular War in the Napoleonic Empire Wars
- Battle of Panipat (1526) - Mogul-Afghan Wars
- Battle of Panipat (1556) - Mogul-Afghan Wars
- Battle of Panipat (1761) - Afghan-Maratha Wars
- Battle of Passchendaele - 1917 - World War I
- Battle of Patay - 1429 - Hundred Years' War
- Battle of Pavia (271) - Alamanni Invasion of the Roman Empire
- Battle of Pavia (476) - Fall of the Western Roman Empire
- Battle of Pavia (569) - Lombard Invasion of Italy
- Battle of Pavia (773) - Conquests of Charlemagne
- Battle of Pavia (1431) - Wars in Lombardy
- Battle of Pavia (1525) - French Wars in Italy
- Battle of Peking - 1900 - Boxer Rebellion
- Battle of Peleliu - 1944 - World War II
- Battle of Pearl Harbor - 1941 - World War II
- Battle of Pharsalus - 48 BC - Wars of the First Triumvirate
- Battle of Philippi (42 BC) (in Macedonia) - Wars of the Second Triumvirate
- Battle of Philippi (1861) (in West Virginia) - American Civil War
- Battle of Philippine Sea - 1944 - World War II
- Battle of the Plains of Abraham - 1759 - Seven Years' War
- Battle of Pilsen - 1618 - Thirty Years' War
- Battle of Pinkie - 1547 - War of the Rough Wooing, England v. Scotland
- Battle of Plataea - 479 BC - Persian Wars
- Battle of Platzberg (1794) - Wars of the French Revolution
- Battle of Pliska - Bulgarian-Byzantine Wars
- Battle of Poitiers - 1356 - Hundred Years' War
- Battle of Poljana - 1945 - World War II
- Battle of Pollentia - 402 - Goth Invasion of the Western Roman Empire
- Battle of Poltava - 1709 - Great Northern War
- Battle of Port Arthur - 1904 - Russo-Japanese War
- Battle of Portland - 1653 - First Anglo–Dutch War
- Battle of Portland Harbour - 1863 - American Civil War
- Battle of Pozzolo (1800) - Wars of the French Revolution
- Battle of Prague (1420) - Hussite Wars
- Battle of Prague (1648) - Thirty Years' War
- Battle of Prague (1744) - War of the Austrian Succession
- Battle of Prague (1757) - Seven Years' War
- Battle of Preston (1648) - Second English Civil War
- Battle of Preston (1715) - First Jacobite rising
- Battle of Prestonpans - 1745 - Jacobite rising
- Battle of Princeton - 1777 - American Revolutionary War
- Battle of Puebla (1847) - Mexican-American War
- Battle of Puebla (1862) - French-Mexican War
- Battle of Pydna - 168 BC - Third Macedonian War
- Battle of Pylos - 425 BC - Peloponnesian War
Read more about this topic: List Of Battles (alphabetical)