The phrase "almost led to war" is correct and usable in written English.
It can be used to describe a situation or event that nearly resulted in a conflict or military action.
Example: "The diplomatic tensions between the two countries almost led to war, but negotiations ultimately prevailed."
Alternatives: "nearly caused a war" or "was on the brink of war."
The incident almost led to war when the US military proposed using surface-to-surface missiles to punish the North Koreans.
Friction with Prussia almost led to war in 1850, but Austria, backed by Russia, forced Prussia to renounce its intentions to form a German state without Austria.
Turkey and Syria agreed to set up the emergency link between their capitals in 1998 to avoid a repetition of a crisis that almost led to war between the two countries that year.
The three islands at the channel's eastern end, Picton, Nueva, and Lennox islands, were the subject of a territorial dispute between Chile and Argentina that began in the 1840s and which almost led to war between the two countries in 1978.
All of this comes just a week after Zynga agreed to enter into a five-year partnership with Facebook to continue its presence on the social network, after tensions between the companies almost led to war.
Just a few years ago, the Kurds and the Iraqi army were involved in a confrontation that almost led to war.
In the case of Cuba, that almost led to a nuclear war.
"We have had a very troubled and unpredictable history," including huge territorial seizures by Russia in the 19th century, an ideological rift during the late 1950's that almost led to a border war in 1969, and population pressures that have sent millions of Chinese emigrants into Russia's Far East in search of work and business opportunities.
The deal comes just days after a near breakdown in peace talks almost led to an irrevocable rupture and a wider war.
Early in the war, supply-chain problems almost led to disaster during the Solomon Islands campaign.
