The phrase "allow the enemy to" is correct and usable in written English.
It can be used in contexts discussing strategy, warfare, or competition where one might intentionally permit an adversary to take certain actions.
Example: "In order to gain the upper hand, we must allow the enemy to underestimate our capabilities."
Alternatives: "permit the opponent to" or "let the adversary".
"There's no state in the world that would allow the enemy to cross its lines and enter its communities.
When the Arkansas's crew was unable to restart the ship's engines, they decided to destroy the vessel rather than allow the enemy to capture it.
Mr. McCain would not allow the enemy to use him to embarrass his father, who was then the United States admiral in charge of the region.
For the thin green line to break would be an act of treason, would be to allow the enemy to storm the ramparts of the motherland - or so would the Springbok players describe it after the game was over.
Every time we judge someone who is struggling, we allow the enemy to capture another victim.
On several occasions, Cao's forces were in excellent position to trap and wipe out whole battalions of Viet Cong, but he would fail to close the trap on one pretext or another and allow the enemy to escape.
According to Iranian news reports, Mr. Jalili told Mr. Assad that "we should not allow the enemies to take revenge" for what Iran views as the defeat of Israel in 2006 and 2009 in wars with "the resistance front," a strategic alliance of the Iran, Syria, the Palestinian Islamic Jihad Movement and the Hezbollah organization in Lebanon.
In this game, they were used in a way to allow the enemies to enter and exit the stage through them to avoid getting enemies piled up on the bottom of the stage.
His decision proved unwise because time allowed the enemy to undermine the conspiracy through widespread arrests and reduction of the army.
Allowing the enemy to use chemical weapons against the Americans, he said, would have disrupted the entire exercise and added to its expense.
"We have allowed the enemy to believe that Diyala has been wide open while we have been generating forces in here to nail them".
