### Overview

The question concerning the name of the government office in charge of international aid and development can have different answers depending on the nation being referred to. Different countries have established specific agencies to manage and implement their international aid programs and policies. Here, we explore the agencies corresponding to the United States and South Korea: "**United States Agency for International Development**" (USAID) and the "**Korea International Cooperation Agency**" (KOICA).

### United States Agency for International Development (USAID)

**Introduction and History**

The United States Agency for International Development, commonly referred to as USAID, is an independent agency of the United States federal government primarily responsible for administering civilian foreign aid and development assistance. With a history dating back to 1961, USAID was established by President John F. Kennedy through an executive order with the goal of promoting socio-economic development abroad as a means of furthering America’s foreign policy interests. 

**Mandate and Operations**

USAID operates under the guidance of the U.S. foreign policy and works in over 100 countries to promote global health, support global stability, provide humanitarian assistance, and enhance democracy. Its projects support economic growth and help to improve agricultural productivity, environmental sustainability, education, and disaster preparedness.

The Agency's efforts are also directed at improving global health by combating infectious diseases such as HIV/AIDS, malaria, and tuberculosis. In disaster situations, USAID provides critical assistance like food aid, emergency medical care, and support for reconstruction.

**Funding and Impact**

USAID programs are funded by the U.S. federal budget, and the organization frequently collaborates with local governments, international organizations, non-governmental organizations, and private sector partners. The impact of USAID's work has been globally recognized for promoting peace and supporting the economic stability that benefits both the recipient countries and the United States.

### Korea International Cooperation Agency (KOICA)

**Introduction and History**

The Korea International Cooperation Agency, known as KOICA, was established in 1991 by the South Korean Government. It was founded to consolidate various non-economic aid efforts into a more structured agency focused on alleviating poverty and promoting sustainable development in developing countries. KOICA reflects South Korea's commitment to international welfare and represents a significant aspect of its foreign policy.

**Mandate and Operations**

KOICA's main functions include the implementation of Korea's grant aid and technical cooperation programs. The agency aims at achieving sustainable development, reducing poverty, and enhancing the welfare of the population in the partner countries. It undertakes various projects that focus on education, health, public administration, and rural development. Additionally, KOICA is instrumental in deploying Korean volunteers overseas to support capacity-building and cultural exchange.

**Funding and Impact**

Funded by the South Korean government through the Ministry of Economy and Finance, KOICA's budget also includes contributions for specific projects from other South Korean ministries and local governments. The agency's impact is evidenced by its numerous successful development projects and humanitarian missions that not only help recipient countries but also promote South Korean diplomatic and cultural interests abroad.

### Conclusion

Both USAID and KOICA are prime examples of how nations utilize specialized agencies to administer international development and aid efforts. Each agency, though similar in global objectives, operates under its unique governance structures and cultural orientations, shaped by the foreign policy goals and national interests of their respective countries. Their work not only aids in the development of partner nations but also fosters international collaboration and goodwill.