What is the that here for?...that from these honored dead ... , that ...?

Question

... It is rather for us to be here dedicated to the great task remaining before us — that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion — that we here highly resolve that these dead shall not have died in vain — that this nation, under God, shall have a new birth of freedom — and that government of the people, by the people, for the people, shall not perish from the earth.

please analyze the paralle --that's... what clause is this that lead to. How should I understand these that clauses.

Thanks

Answer 1

Each that introduces its clause as "something indicated or understood."