I'm somewhat confused at this question, but will give my best to answer it.
Spartan soldiers helped save retreating members of the Greek army:
against a force of three hundred Persian troops - this surely is false, as there never was a three hundred strong Persian force.
against the strength of the Athenian navy - this doesn't make much sense either, as the Athenian navy was Greek, so there's no reason for Spartan soldiers to defend greeks against the Athenian navy.
at the Battle of Marathon - the Spartans were not involved in this battle as they were celebrating a religious festival at the time.
The most likely answer is therefore at the Battle of Thermopylae, where a small Spartan contingent of soldiers stayed to defend the frontiers of their borders in order to enable the rest of the army that was with them at the time, to retreat.
Yes, Unitary is like Russia. Ruled by one leader or dictator.
It is the income per man hour
I won't go into too much details but the Asian country that defeated Russia in war, namely the Russo-Japanese war(1904-05) was Japan.
It was a conflict based on good military strategy. It all started because Japan wanted Korea as a province but Russia did not allow that to happen so Japan tried to negotiate to get Korea in exchange that Russia could keep Manchuria but Russia refused and negotiations broke down so Japan thought of an alternative...war.
Japan knew that Russia had a massive army but Japan had a very mobile and well trained army so they used that to their advantage. So the Japanese fleet open fired on the Russia Eastern Fleet in Port Arthur which eventually got destroyed. As Russia suffered humiliating defeats, the country thought it could beat Japan but Japans strategy proved superior so they defeated Russia in many battles. So in order to prevent a total "defeat", Russia asked for Peace (U.S as the middleman)which gave Japan some of what it wanted but not all. This caused both countries to be dissatisfied...
