A big item on President Obama’s India to-do list this weekend is securing a $5 billion deal for Boeing to sell 10 of its C-17 cargo planes.

The agreement, for which Boeing and American officials have long laid the groundwork, would be part of a flurry of military equipment deals that foreign suppliers are eager to nail down with India. Mr. Obama’s French and Russian counterparts are expected to visit New Delhi this year, with their own military sales contracts in hand.

India, flush with new wealth but worried about its national security, is rapidly turning into one of the world’s most lucrative arms markets.

In the last several years, as its budget and appetite for more sophisticated weaponry have grown, India has reduced its traditional reliance on Russia for planes, ships and missiles.