The phrase "attack was forced" is correct and usable in written English.
It can be used in contexts where an attack is compelled or necessitated by circumstances, often in discussions about military strategy or competitive scenarios.
Example: "The team had no choice but to respond; the attack was forced by the opponent's aggressive tactics."
Alternatives: "attack was compelled" or "attack was necessitated."
When the victim of the 'tar and feather' attack was forced on to a main road, the placard placed around his neck and his plight filmed by mobile phone, the locals admitted there were cheers of support.
Veteran dancer Nikolai Tsiskaridze, who was in open conflict with the theatre since the attack, was forced out in June.
Under the Bush administration, however, Iranians fearful of an attack were forced to scale back their criticisms and attempts at political liberalization.
A growing number of crocodile attacks is forcing police in the Solomon Islands to shoot the animals and to consider lifting a 30-year ban on exporting their valuable skins in order to control the population.
The mounting attacks are forcing U.S. troops in Iraq to crouch more and more behind their own barricades, to mistrust more and more Iraqis, and to put up more and more roadblocks.
An example of such attacks is forcing the cloud management system to create many migrations, leading to a DoS attack on the VMs and the involved hosts.
Griffiths burst forward in a rare Hibs attack but was forced wide by Gillet and Esson was able to save the substitute's shot without too much trouble.
Martin Sheen suffered a heart attack and was forced to leave the movie for a few weeks!
Meanwhile, 3 RAR's tactical headquarters came under attack and was forced to fight off a group of North Koreans.
In a vain effort to save Atlanta, Hood promptly attacked but was forced back into the city, which he held for five weeks.
She became pregnant during one of the attacks and was forced to give birth in the company of the militias; the baby died.
