** Battle of Placentia — Emperor Aurelian is defeated by the Alemanni forces invading Italy

** Battle of Fano — Aurelian defeats the Alemanni, who begin to retreat from Italy

** Battle of Pavia — Aurelian destroys the retreating Alemanni army.

** Battle of Lingones — Caesar Constantius Chlorus defeats the Alemanni

** Battle of Vindonissa — Constantius again defeats the Alemanni

** Battle of Albert ( 1914 )

** Battle of Albert ( 1916 )

** Battle of Albert ( 1918 )

** The Battle of Marathon by Elizabeth Barrett Browning ( 1820 )

** Lazarica or Battle of Kosovo by Joksim Nović-Otočanin ( 1847 )

** The Battle of Harpers Ferry ( September 12 – 15, 1862 ), a battle in the American Civil War that took place around what is now Harpers Ferry, West Virginia

** Battle of Marathon

** Their Finest Hour: The Battle of Britain and Operation Sea Lion, GDW ( 1982 ), boardgame: part of GDW's Europa system.

** Battle of Pagan in 1287, Mongol defeat of Pagan Kingdom

** Battle of Sedan ( 1870 ), 2 September 1870

** Battle of Sedan ( 1940 ), 12 – 15 May 1940

** Battle of Sinop, 1853 naval battle in the Sinop port

** The Battle of Trenton, New Jersey

** The Second Battle of Trenton

** Germany faces the United Kingdom in the Battle of Britain ( 1940 ).

** WWI: Battle of Passchendaele: After 3 months of fierce fighting, Canadian forces take Passchendaele in Belgium.

** WWI: Third Battle of Gaza: United Kingdom forces capture Gaza from the Ottoman Empire.

** WWI: Battle of Cambrai: British forces, using tanks, make early progress in an attack on German positions but are soon beaten back.

** Sri Lankan civil war – Battle of Pooneryn: Over 400 Sri Lankan military are killed.

** Chinese communist troops fail to take Quemoy in the Battle of Kuningtou ; their advance towards Taiwan is halted.

** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** If the set A is infinite, then there exists an injection from the natural numbers N to A ( see Dedekind infinite ).

** Every infinite game in which is a Borel subset of Baire space is determined.

** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.

** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.

** The Nielsen – Schreier theorem, that every subgroup of a free group is free.