The phrase "a major offensive on" is correct and usable in written English.
It can be used in contexts related to military actions, strategic initiatives, or significant efforts aimed at achieving a goal.
Example: "The army launched a major offensive on enemy territory to reclaim lost ground."
Alternatives: "a significant attack on" or "a large-scale assault on".
When Islamic State jihadists launched a major offensive on the majority Kurdish town of Kobane in September, more than 180,000 people fled across the border into Turkey.
The refugees were fleeing Kobane, also known by its Arabic name Ayn al-Arab, after Islamic State (IS) jihadists launched a major offensive on the majority Kurdish town last month.
In April, a major offensive on the governor's compound killed nearly 40 Afghans, many of whom worked for the provincial government in some capacity.
In November 1989 the FMLN launched a major offensive on a number of urban centres in the country, including the capital city, San Salvador.
In November 1989 the FMLN launched a major offensive on a number of urban centres in the country, including the country's capital, San Salvador.
ESAIWID, Iraq — With extraordinary secrecy, and even an information blackout aimed at most of their Iraqi Army comrades, American troops began a major offensive on Tuesday to drive Sunni insurgents from strongholds in Diyala Province.
Yemeni military officials said on Tuesday that troops, backed by aircraft, had launched a major offensive to drive Aqap out of towns in Shabwa province.
On Wednesday night, US-led coalition fighter jets provided air support to around 7,500 Kurdish and Yazidi fighters launching a major offensive to retake the key town of Sinjar.
But he has also developed into a major offensive contributor on the Rangers second line.
To put a halt to these and reunite the GUNT, a major offensive was launched on the Red Line with the goal of taking N'Djamena.
The LRA later went on a major offensive, carrying out a massacre on Christmas Day 2008.
