Brett Ashley Leeds
Rice University

with assistance from:
Andrew G. Long,
Michaela Mattes,
Sara McLaughlin Mitchell,
Jeffrey M. Ritter,
and Burcu Savun

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Project Description and Coding Rules

The Alliance Treaty Obligations and Provisions (ATOP) project provides data regarding the content of military alliance agreements signed by all countries of the world between 1815 and 2003. We gratefully acknowledge the support of the National Science Foundation (grant SES-0095983). We define our terms and explain the process through which the data were collected and coded in the ATOP codebook, available for download here.

From this website, you can use our search engine to find the alliances of interest to you and view a codesheet describing each alliance (usually with direct quotations from the primary text). The codesheets also provide citations to the full text of the agreements. You can also download numeric datasets useful for statistical analysis. Finally, we provide citations to some of the published research that has been accomplished using the ATOP data.

Before proceeding, we encourage users to review the documentation explaining the ATOP project and data. You will find links to download this information to your right.