declare war against (someone or something)

(redirected from declare war against them)

declare war against (someone or something)

1. To officially announce the intention to fight against an enemy country or group in a war. We will have to declare war against the rebels if they advance over our border.
2. To announce the intention to vehemently oppose someone or something. This usage does not refer to physical fighting. The mayor has declared war on crime in our city and is bolstering our police force.
See also: declare, war
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

declare war against someone or something

 and declare war on someone or something 
1. Lit. to formally announce that one will fight a war with someone or some country. A group of countries declared war against the aggressor.
2. . Fig. to announce a serious campaign against a type of person or a serious problem. The president declared war against crime and criminals. The pressure group declared war on waste.
See also: declare, war
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
We'll declare war against them, we can beat them," he stated.
I will declare war against them. Kaya man natin 'yan sila.
We'll declare war against them, kaya man natin 'yan sila (we can handle them, anyway)," Duterte said.
To seek revenge for what Walker and his men have done, Troy clearly wants to declare war against them. But his brother, Jake (Sam Underwood), doesn't think it's the right idea.
He said that government had only two options either to bow before the Taliban or to declare war against them. But government with the support of the masses has to decide to dismantle and eliminate Taliban who completed innocent children to carry suicide attack.