"commit the union" is not correct or usable in written English as written.
It could be used if it was given a bit more context. For example, you could use it in a sentence such as: "The new law will commit the union to working towards greater pay equality."
He acted with full awareness that such a proclamation would end all hope of conciliation and commit the Union to an all-out war.
France's president, Jacques Chirac, is keen to commit the Union to a robust defence posture in which France would be prominent.Fears of an unseemly bust-up between the two countries which would form the heart of any serious European military force Britain and France were running high as the summit approached.
But the conference had earlier rejected a more hardline proposal to commit the union to four days of strikes in the autumn.
The NUT motions commits the union to negotiating with the incoming government to try and get a commitment from it to restore the cuts in both teachers' pay and to school budgets over the past five years.
"A lot of people are concerned just how committed the unions are to hurting members of Congress and how they use a different standard for the vice president," Mr. Rangel said.
This arts initiative was intended to commit the trade unions to culture.
The prime minister said it was possible to be proud of the individual nations in the United Kingdom while remaining committed to the union.
Working class adherence to the two political parties most committed to the union left little space for the growth of nationalism.
It leaves the locus of political authority in dispute, as well as highlighting the anomaly of Scottish MPs committed to the union with Europe, but not with Great Britain.
Both emotionally and intellectually, he is fiercely committed to the union as a source of strength for both Scotland and Britain, insist Conservative colleagues who have discussed the question with him.
But they have also failed, committed to the union as they are, to establish a strong Scottish identity.John Curtice, professor of politics at Strathclyde University, thinks they have another problem.
