What specific language in the Emancipation Proclamation indicates that the freeing of slaves is partly for military reasons

The specific language is ‘Moreover, the Proclamation announced the acceptance of black men into the Union army and Navy enabling the liberated to become liberators’.

This is gotten from the excerpt which explains the main reason why the slaves were freed. They were freed for partly military reasons as they were integrated into the Union Army and Navy to strengthen the military system during the war.

answer: to establish fair access to employment opportunities to create a workforce that is an accurate reflection of the demographics of the qualified available workforce in the relevant job market.

explanation:

the lachish letters were written by hoshaiah, a military officer stationed possibly in mareshah,   and sent to yaush, possibly the commanding officer at lachish.

the series of letters were written in carbon ink in ancient hebrew on clay ostraca, shortly before lachish fell to the babylonian army of king nebuchadnezzar in 588/6 bc during the reign of zedekiah, king of judah.