 
 <prompt> Wetin be di type of ammunition wey no go dey common for 1940? Based on di question wey dey before dis one, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Until di 1950s, guns wey dey fire ballistic munitions na im dey standard weapon; guided missiles come later come dominate, 'cept for very short ranges. However, di type of shell or warhead and how e dey set to explode, and with missiles di guidance arrangement, dey different. Targets no dey always easy to destroy; but still, aircraft wey don spoil fit dey force to cancel dia mission and, even if dem manage return and land for friendly territory, dem fit dey out of action for days or permanently. Ignoring small arms and smaller machine-guns, ground-based air defence guns don dey different in calibre from 20 mm reach at least 150 mm. 