Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: After initially being posted to the 1st Battalion, in March, 1916 he was transferred to the 53rd Battalion, which was part of the 5th Division, when the Australian Imperial Force was reinforced with fresh recruits from Australia.

Originally named to the 1st Battalion in 1916, he was moved to the 53rd Battalion (Part of the 5th Division), when the Australian Imperial Force was backed up with new soldiers.