Truly <infinitive verb> courage of the Russian warrior. The verb is something built on top of "to write".
"Gangut 1714-1964" "(In truth/trully/in all conscience) the courage of Russain warriors can not be described. Peter II" It means that they were SO brave, that there is no way to describe it in a way that would properly match the reality. As far as i understand, this is a http://en.wikipedia.org/wiki/Battle_of_Gangut medal.
Commemorative medal: "250th Anniversary - navaL battle in Gangut". Portrait of Piter the Great. "It's truly impossible to describe the courage of Russian soldiers!"