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Second Athenian Confederacy
The Second Athenian League was a maritime confederation of Greek city-states that existed from 378 to 355 BC under the leadership (hegemony) of Athens. The alliance represented a partial revival of the Delian League, which had been disbanded in 404 BC following the defeat of Athens in the Peloponnesian War. The new League was centered in the Aegean and included over 60 states, among which were Kos, Mytilene, Rhodes, and Byzantium. It was primarily formed as a defensive alliance against Sparta and secondly the Persian Empire. The new League's main objective was to preserve peace in Greece and counterbalance Sparta's growing hegemony and aggression. The League largely revived Athenian influence in the Greek world, reestablishing it as the strongest naval power in the eastern Mediterranean. This time, Athens made conscious efforts to avoid the strict terms that had eventually rendered the previous Delian League unpopular. The alliance lasted until 355 BC, when most of the allied citie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Second Athenian League Map
The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of Units (SI) is more precise: The second ..is defined by taking the fixed numerical value of the caesium frequency, Δ''ν''Cs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be when expressed in the unit Hz, which is equal to s−1. This current definition was adopted in 1967 when it became feasible to define the second based on fundamental properties of nature with caesium clocks. As the speed of Earth's rotation varies and is slowing ever so slightly, a leap second is added at irregular intervals to civil time to keep clocks in sync with Earth's rotation. The definition that is based on of a rotation of the earth is still used by the Universal Time 1 (UT1) system. Etymology "Minute" comes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
