The Latex code provided below shows the usage of the command "\indent" as it appears in the document,but it does not produce the desired indentation within the document. Is there a specific package associated with the command "\indent" or "\="? I am asking for a step by step method of producing an indentation within a document for only one paragraph, regardless of location within the document.

\documentclass[12pt]{article} \usepackage{graphicx}
\topmargin -3.5cm
\oddsidemargin -0.04cm
\evensidemargin -0.04cm
\textwidth 16.59cm \textheight 21.94cm \parskip 7.2pt
\parindent 8pt
\title{Physics}

\author{Pareshkumar Brahmbhatt}

\date{March 17, 2010}

\begin{document}
\maketitle

\indent Now we are engaged in a great civil war.

\end{document}