A bomber is a military aircraft

Strategic bombers are primarily designed for long-range strike missions with bombs against strategic targets such as supply bases, bridges, factories, shipyards, and cities themselves, in order to damage an enemy's war effort. Examples include the: Avro Lancaster, Heinkel He-111, Junkers Ju 88, B-17 Flying Fortress, B-24 Liberator, B-29 Superfortress, B-36 Peacemaker, B-47 Stratojet, B-52 Stratofortress, General Dynamics F-111, Tupolev Tu-16 'Badger', Tupolev Tu-160 'Blackjack', Tupolev Tu-95 'Bear', and Gotha G.
Tactical bombers are smaller aircraft that operate at shorter range, typically along with troops on the ground. This role is filled by many designs, including those listed below. In modern terms, any combat aircraft that is not a purpose-designed strategic bomber falls into this category. Ground attack aircraft or "close air support" aircraft are designed to loiter over a battlefield and attack tactical targets, such as tanks, troop concentrations, etc. Examples: Junkers Ju 87 Stuka, Ilyushin Il-2 Shturmovik, A-10 Thunderbolt II, and Sukhoi Su-25 'Frogfoot'.

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