Darkened areas represent countries still dealing with significant cluster bomb contamination. Other countries affected by cluster bombs are highlighted in lighter orange.

Syrian forces used at least 249 cluster bombs between July 2012 and July 2014 during the continuing conflict in that country, according to Human Rights Watch.

In South Sudan, the United Nations Mine Action Service found new cluster bomb contamination in February this year, according to the Cluster Munition Coalition, an international civil-society campaign against cluster bombs. Other countries affected by such weapons in the past decade include Libya, Lebanon, Iraq, Israel and Georgia.

In 2001 and 2002, the United States dropped 1,228 cluster bombs containing 248,056 bomblets in Afghanistan, according to the coalition.

The international Convention on Cluster Munitions, signed in 2008, was intended to “put an end for all time to the suffering and casualties caused by cluster munitions.” Each participant undertakes never to use, stockpile, produce or retain cluster bombs. Currently the convention has 113 signatories, according to the information published by the United Nations Development Program’s Bureau for Crisis Prevention and Recovery .

Seventeen countries including China, Russia, Israel, and the U.S. have not signed the convention and are among nations that produce such weapons, according to the Cluster Munition Coalition.

The coalition says 91 countries have previously stockpiled cluster bombs, and 23 of those countries — including Afghanistan, Chile and Colombia — have completely destroyed their stockpiles, while dozens of other countries are in the process of doing so.