"Ex Unitate Vires" - From unity, strength or Unity is Strength.
Origin language, Latin (High Galactic)
A motto to represent the unity of the army corps gives it its strength, that all in the army no matter their species or creed they are united together and are stronger for it. To have trust in one's fellow comrades and embrace it through thick and thin.

"Adapt your body! Adjust weapons! Combat the enemy!"

Since the famous conversation between Consul Mejas Doto and Proconsul Sashar Arconae during the first sight of AAF training as the new found militaristic organ.
"They adjust very well to the new form of the training." Said Mejas.
"And the Selenian's are adapting combat styles of others in high fast rate."
These words where overheard by Commander Zenkai who made a signal to synchronized three step, training march towards fake enemy line with words:
"Adapt - your - body!"
"Adjust - your - weapon!"
Which was easily assimilated within forces as a guideline for these march techniques.

Later in history Sashar Erinos Arconae admiring a specific (only Selenian) group of warriors training for AAC during his routine checks of the army.

Their dedication, flexibility in different field scenarios, alongside foresighting of the enemy's move made him to modify original motto of AAF to match present one as the most beneficial for new recruits to remember during their future battles in AAC military structures.