Noun
An appeal to fight or to engage in conflict.
(figuratively) An appeal to undertake a particular course of action or to support a specific cause; a call to action.
Source: en.wiktionary.orgcall-to-arms
I want my photos to be fresh and urgent. A good photograph should be a call to arms. Terry Richardson
They're the rallying cries of prejudice, the call to arms of those who find it easier to hate than admit they might be not be right about everything. Michael Palin
A call to arms and a condemnation. Source: Internet
The building and the surrounding streets have been declared a National Historic Landmark The riots spawned from a bar raid became a literal example of gays and lesbians fighting back, and a symbolic call to arms for many people. Source: Internet
“As a force, we have had a call to arms this weekend and all officers will be out and about, particularly in London,” British Transport Police said. Source: Internet
“A startling call to arms. Source: Internet