Tyrtaeus in his poetry urged the Spartans to remain loyal to the state and he reminded them of a constitution based on divine providence, requiring co-operation of kings, elders and the people. He sought to inspire them in battle by celebrating the example of their grandfathers' generation, when Messenia was first captured, in the rule of King Theopompus, and he gave practical advice on weapons, armour and tactics (see for example the verses below). Some modern scholars however think his advice shows more familiarity with the schoolroom than with the battlefield, appearing to feature obsolete armour and tactics typical of Homeric rather than hoplite warfare. Others have argued that the Spartans at that time were still developing hoplite tactics or that they were adapting hoplite tactics to encounter Messenian guerillas.