The phrase "assertion of opposition" is correct and usable in written English.
It can be used when discussing a statement or claim that expresses disagreement or resistance to a particular idea or position.
Example: "The politician's speech was an assertion of opposition to the proposed legislation, highlighting the concerns of his constituents."
Alternatives: "declaration of dissent" or "statement of resistance".
The same indeterminacy characterized West's sexual persona, in which her saucy femininity was conjoined with a masculine assertion of power -- an opposition that led to the "drag" rumors.
Chapter 4 returns to sailors' manly assertion of their rights and opposition to maltreatment, this time at the hands of American ship captains.
Even if the opposition's assertion of a first-round victory is not accepted, Milosevic allies fear that the elections could mark the beginning of the end of his 13-year rule.
GENEVA — The United Nations Human Rights Council was preparing to call on Friday for an international inquiry into last week's massacre of more than 100 Syrian civilians at Houla, challenging the assertion by Syrian authorities that it was the work of opposition gunmen.
Some news media outlets in Britain and Germany have carried reports based on assertions of exiled Iraqi opposition figures that the Iraqi leader is in intensive care after the stroke.
But the dissenters objected strenuously to that principle's application in this case, because they said the majority had done little more than accept at face value the Boy Scouts' assertion of the central importance of their opposition to homosexuality.
He had gone on state TV earlier to repeat the now-familiar assertion that opposition sabotage rather than a lack of maintenance had caused the afternoon blackout, saying hackers had attacked computers at the country's main hydroelectric dam.
Further evidence in support of the assertion that many opposition leaders are driven by a hunger for power is their inability to present to the people concrete and comprehensive proposals to address the structural problems of poverty, unemployment, inflation, corruption, oppression and human rights violation in their countries.
"Forces of opposition, bow down.
He mastered the art of opposition.
