The phrase "assertive stance to" is correct and usable in written English.
It can be used when discussing a position or attitude that is confident and self-assured, often in relation to a specific issue or topic.
Example: "In negotiations, it is important to maintain an assertive stance to ensure your needs are met."
Alternatives: "confident position on" or "decisive approach to".
Xi has scrapped China's traditional deference on the global stage for an assertive stance intended to extend Chinese influence beyond the Asia-Pacific region and into Africa and Latin America.
If either or both were to pass, it would represent the most assertive stance by Congress to date on the Libya conflict and highlight the chronic tensions between the executive and legislative branches over the president's ability to wage war without Congress's express approval.
Japan and South Korea are at odds over an islet claimed by both, and China stoked anger with its increasingly assertive stance regarding its claims to resource-rich waters to the south and east.
The Obama administration has experimented with a variety of approaches: pledging to respect China's "core interests" in 2009; shifting in 2011 to a more assertive stance — verging on containment — as Mr. Obama articulated his pivot to Asia; then resisting China's proposal in 2012 to embark on a new model of great-power relations.
Even while he has relished a return to the spotlight in recent months thanks to his assertive stance on the border crisis, the threat of serious legal trouble has been skulking in the background.
The television commercials in the campaign, with an initial budget estimated at more than $25 million, carry the theme "play to win," a more assertive stance for I.B.M. than in recent months when its advertising seemed muted to reflect the chastened mood of the marketplace after the dot-com crash.
That incident prompted Prime Minister Nouri al-Maliki to take a more assertive stance in Anbar, including a crackdown on Sunni demonstrators who were protesting against his Shiite-led government.
There is a great debate going on in Washington about whether the US should change its China policy in response to Beijing's more assertive stance under President Xi Jinping.
For them, disagreement is more than a bit uncomfortable it's painful, and on a day-to-day basis extremely difficult to overcome even when situations warrant an assertive stance.
Moscow's more assertive stance makes it harder than before for the US to impose a no-fly zone over northern Syria – even if it were so inclined.
